Utility Relay Company AC-PRO-II User manual

Chagrin Falls, OH 44023
Phone: [phone]
www.utilityrelay.com
I-AC-PRO-II AC TRIP UNIT
A C -P R O -II
®
S TATE OF THE ART TECHNOLOGY FOR LOW
VOLTAGE CIRCUIT BREAKER RETROFITTING
IN STRU C TIO N m A N U A L

AC-PRO-II® Instruction Manual www.utilityrelay.com
Page 1
Manual Revision 1.4
Section: Page
1.0 Introduction and Product Overview..........................3
1.1 Current Protection and Functions......................3
1.2 Voltage and Power Features - optional Voltage
Divider Module (VDM) ......................................3
1.3 Additional Features...........................................3
2.0 UL/ULC Classification & CE Mark.............................4
3.0 Trip Unit Power..........................................................4
3.1 Current Transformer (CT) Power ......................4
3.2 Battery Power...................................................4
3.3 USB Power.......................................................4
3.4 24VDC Auxiliary Power.....................................4
3.5 Voltage Divider Module (VDM) Power (option)..4
4.0 AC-PRO-II® Pictures and Configurations..................5
5.0 External Connections................................................8
5.1 Breaker Wiring Harness..................................11
5.1.1 Ground Fault Wiring Configurations ....11
5.2 QUICK-TRIP®Connector................................11
5.3Auxiliary Connections .....................................11
5.3.1 Configurable Alarm Relay ...................11
5.3.2 Ground Fault Defeat Input...................12
5.3.3 URC Breaker Position Switch..............12
5.4 RS-485 Communications Terminal Block........12
5.5 24VDC Auxiliary Power...................................12
5.6 USB Port ........................................................12
5.6.1 USB Extension cable ..........................12
5.6.2 USB Extension Cable Installation........13
5.7 VDM Connections (optional)...........................13
6.0 Menu Navigation......................................................13
6.1 Power Menu ...................................................16
6.2 Settings Menu.................................................16
6.3 Trip History Menu ...........................................16
6.4 More Menu .....................................................16
6.4.1 Time and Date Setting ........................16
6.4.2 Battery Test and Status.......................17
7.0 QUICK-TRIP®System (optional)..............................18
7.1 QUICK-TRIP®Basics & Operation..................18
7.2 AC-PRO-II QUICK-TRIP®Switch Mounting.....19
7.3 Remote QUICK-TRIP®Switch.........................19
7.4 QUICK-TRIP®Remote Indication....................19
8.0 Voltage Divider Module (VDM) (optional)...............20
9.0 SAFE-T-TRIPTM (optional)........................................20
10.0 Sluggish BreakerTM Detection .................................20
11.0 Commissioning the AC-PRO-II®..............................21
11.1 Powering-Up the Trip Unit for Commissioning.21
11.1.1 Internal Battery....................................21
11.1.2 USB Power.........................................21
11.1.3 24VDC Auxiliary Power.......................21
11.2 Un-commissioned Screen...............................21
11.3 Entering & Changing Settings locally..............22
11.4 Security Code.................................................25
11.5 CT Tap...........................................................25
11.6 CT Secondary Rating .....................................25
11.7 Power Flow Direction......................................25
11.8 Frequency ......................................................25
11.9 Long Time (LT)...............................................25
11.10Thermal Memory ............................................25
11.11Short-Time (ST)..............................................25
11.12Instantaneous (I).............................................25
11.13Ground Fault (GF) Protection..........................26
11.14Neutral Overload (NOL) Settings ....................26
11.15QUICK-TRIP®Instantaneous (QT-I)................26
11.16QUICK-TRIP Ground Fault (QT-GF)...............26
11.17Undervoltage (UV)..........................................27
11.18Overvoltage (OV)........................................... 27
11.19Sluggish Breaker Setting................................ 27
11.20Configurable Alarm Relay Settings................. 27
11.21Breaker Position Contact Type Setting........... 27
11.22Saving Settings.............................................. 27
11.23Settings Verification ....................................... 27
11.24Settings Review ............................................. 28
11.25Time & Date Settings ..................................... 28
11.26Communications Settings............................... 28
12.0 Trip History.............................................................. 29
13.0 Normal Operations & Readings.............................. 31
14.0 Testing..................................................................... 31
14.1 Commission the Trip Unit............................... 31
14.2 Long Time Trip Test....................................... 31
14.3 Short Time Trip Test ...................................... 32
14.4 Instantaneous Trip Test.................................. 32
14.5 Neutral Overload (NOL) Trip Test................... 32
14.6 Ground Fault Trip Tests ................................. 32
14.6.1 Residual Ground Fault Trip Test......... 32
14.6.2 Ground Return Fault Trip Test............ 32
14.7 QT-GF Trip Test............................................. 32
14.8 CT Phasing Test for GF ................................. 32
14.9 QT-I Trip Test................................................. 33
14.10Undervoltage (UV) Test.................................. 33
14.11Overvoltage (OV) Test ................................... 34
15.0 Secondary Injection Testing................................... 34
15.1 Secondary Injection Test Set.......................... 34
15.2 Standard Relay Test Set................................ 34
15.3 LT Delay Testing Chart .................................. 35
15.4 Neutral Overload Testing Chart...................... 36
16.0 Ratings & Physical Information.............................. 36
17.0 Warranty .................................................................. 37
18.0 Time-Current Curves (TCC).................................... 37
18.1 Long Time (LT) Trip Time............................... 37
18.2 Short Time (ST) Trip Time.............................. 38
18.3 Ground Fault (GF) Trip Time.......................... 40
18.4 Neutral Overload (NOL) Trip Time.................. 40
18.5 Current Metering Accuracy............................. 44
19.0 Voltage & Power Calculations................................ 44
20.0 Error and Alarms..................................................... 44
20.1 Internal Error.................................................. 44
20.2 Actuator Open Circuit..................................... 44
20.3 Alarm Screens ............................................... 44
20.4 Un-Calibrated................................................. 44
21.0 Battery ..................................................................... 45
21.1 Checking the Battery Voltage......................... 45
21.2 Battery Replacement...................................... 45
22.0 Rotating the Display................................................ 45
23.0 InfoPro-ACTM Software Application........................ 46
23.1 Firmware Versions and Updates .................... 46
24.0 Communications..................................................... 49
24.1 Communications Introduction......................... 49
24.2 Communications Components ....................... 49
24.3 Communications Wiring ................................. 49
24.4 System Components & Computer Hardware.. 49
24.4.1 Ethernet.............................................. 49
24.4.2 LCI Ethernet....................................... 49
24.5 Trip Unit Programming................................... 50
24.6 Modbus Registers.......................................... 50
For latest version, visit:
http://www.utilityrelay.com/Side_Bar/Instruction_Manuals.html
Table of Contents

AC-PRO-II®Instruction Manual www.utilityrelay.com
Page 2
List of Tables and Figures
Figure Page
Figure 4.1 AC-PRO-II Front View - Horizontal Configuration........................................................................................................5
Figure 4.2: AC-PRO-II Front View - Vertical Configuration with Breaker Harness at bottom...................................................... 6
Figure 4.3: AC-PRO-II Side View (without VDM)............................................................................................................................6
Figure 4.4: AC-PRO-II Angled Views – with and without VDM......................................................................................................7
Figure 4.5: AC-PRO-II connectors and cables ...............................................................................................................................7
Figure 5.1: AC-PRO-II External Connections - Vertical Bottom Configuration............................................................................8
Figure 5.2: Voltage Divider Module (VDM) External Connections................................................................................................9
Figure 5.3: AC-PRO-II Typical Wiring Diagram............................................................................................................................10
Figure 5.4: AC-PRO-II Typical Ground Return Wiring Diagram ..................................................................................................11
Figure 5.5: USB Extension cable..................................................................................................................................................12
Figure 5.6: USB Extension Plate Drilling......................................................................................................................................13
Figure 5.7: USB Extension Plate & Cable Installation.................................................................................................................13
Figure 6.1: Main Screen.................................................................................................................................................................13
Figure 6.2: Typical AC-PRO-II Menu Navigation Map - Simple View........................................................................................... 15
Figure 6.3: Power Menu Screens..................................................................................................................................................16
Figure 6.4: Settings Menu first screen .........................................................................................................................................16
Figure 6.5: MORE Menu.................................................................................................................................................................17
Figure 7.1: QUICK-TRIP System and Connections......................................................................................................................18
Figure 7.2: AC-PRO-II QUICK-TRIP Switch Drilling Plan.............................................................................................................19
Figure 7.3: QUICK-TRIP Switch Mounting....................................................................................................................................19
Figure 7.4: AC-PRO-II QUICK-TRIP Switch...................................................................................................................................19
Figure 9.1: SAFE-T-TRIP ...............................................................................................................................................................20
Figure 9.2: SAFE-T-TRIP in case...................................................................................................................................................20
Figure 10.1: Sluggish Breaker Screen..........................................................................................................................................21
Figure 11.1: Un-commissioned Screen ........................................................................................................................................21
Figure 11.2: Change Settings Menu - Part 1.................................................................................................................................22
Figure 11.3: Change Settings Menu - Part 2.................................................................................................................................23
Figure 11.4: Change Settings Menu - Part 3.................................................................................................................................24
Figure 11.5: Settings Screen - Review Button .............................................................................................................................28
Figure 11.6: Communications Settings........................................................................................................................................28
Figure 12.1: Trip History Menu .....................................................................................................................................................30
Figure 13.1: Main (“Readings”) Screen........................................................................................................................................31
Figure 13.2: Power Screen #1:......................................................................................................................................................31
Figure 13.3: Power Screen #2: Energy.........................................................................................................................................31
Figure 14.1: Phase A & B, CT Polarity Test..................................................................................................................................33
Figure 14.2: Phase B & C, CT Polarity Test..................................................................................................................................33
Figure 14.3: Undervoltage Test.....................................................................................................................................................33
Figure 14.4: Overvoltage Test.......................................................................................................................................................34
Figure 15.1: B-292 Secondary Injection Test Set.........................................................................................................................34
Figure 16.1: AC-PRO-II & Quick Trip Switch Drawings and Dimensions...................................................................................36
Figure 18.1: Overload TCC............................................................................................................................................................39
Figure 18.2: Ground Fault (GF) TCC.............................................................................................................................................41
Figure 18.3: Neutral Overload (NOL) TCC....................................................................................................................................42
Figure 18.4: QUICK-TRIP Ground Fault and QUICK-TRIP Instantaneous TCCs ........................................................................43
Figure 20.1: Internal Error Screen ................................................................................................................................................44
Figure 20.2: Actuator Open screen...............................................................................................................................................44
Figure 20.3: Trip Alarm Screen.....................................................................................................................................................44
Figure 20.4: OverVoltage Alarm Screen.......................................................................................................................................44
Figure 20.5: UnderVoltage Alarm Screen.....................................................................................................................................44
Figure 20.6: Clear Alarms Screen.................................................................................................................................................44
Figure 20.7: Un-Calibrated Screen................................................................................................................................................44
Figure 21.1: Battery Door..............................................................................................................................................................45
Figure 22.1: Display Case Screw locations..................................................................................................................................45
Figure 22.2: Trip Unit and Display (separated) ............................................................................................................................46
Figure 23.1: InfoPro-AC Readings Tab Screenshot.....................................................................................................................47
Figure 23.2: InfoPro-AC Waveform Tab Screenshot....................................................................................................................47
Figure 23.3: InfoPro-AC Trip History Tab Screenshot.................................................................................................................48
Figure 23.4: InfoPro-AC Settings Tab Screenshot.......................................................................................................................48
Figure 24.1: Ethernet configuration..............................................................................................................................................50
Figure 24.2: LCI Ethernet Configuration ......................................................................................................................................50
Tables Page
Table 3-A: CT Power-up values ......................................................................................................................................................4
Table 5-A: Alarm Relay Configuration..........................................................................................................................................12
Table 6-A: Common Smart Button Actions..................................................................................................................................14
Table 12-A: Trip Types ..................................................................................................................................................................29
Utility Relay Company
10100 Queens Way
Chagrin Falls, OH 44023
www.utilityrelay.com
Phone [phone]
Fax: [phone]

AC-PRO-II® Instruction Manual www.utilityrelay.com
Page 3
The AC-PRO-II®is a state of the art, micro-controller based
trip unit for use on three phase, 600 Volt class, AC circuit
breakers on 50 Hertz or 60 Hertz systems. The AC-PRO-II
features a rotatable 128 x 64 Multi-line, Organic Light Emitting
Diode (OLED) Display, smart buttons, and LEDs.
The standard AC-PRO-II provides:
•Overload and fault protection
•RS485 communications
•QUICK-TRIP®arc flash hazard reduction ready
•Patented Sluggish Breaker®detection
•Time stamped trip history with waveform capture
•InfoPro-ACTM software interface
•Ready for the SAFE-T-TRIP®hand-held remote trip
device
•And many other features
Additionally, with the optional Voltage Divider Module (VDMTM),
the AC-PRO-II can provide over/under voltage protection and
power calculations.
The AC-PRO-II is 55% smaller than the original AC-PRO®and
including more features and more flexibility. The smaller form
factor allows application on a wider range of breakers. The trip
unit features versatile user settings that allow setting the
frequency (50Hz or 60Hz), CT secondary rating, and Ground
Fault type in the field, eliminating the need for a special factory-
configured trip unit and simplifying the kit ordering process.
The AC-PRO-II is backwards compatible with existing AC-PRO
CTs, actuators, wiring harness, and settings, making direct
replacements easy. Similar to AC-PRO, the AC-PRO-II
settings are entered using simple parameters. No percentages
or multipliers are required. AC-PRO-II settings are
programmed using the easy-to-read multi-line OLED display.
The AC-PRO-II includes the following Current-based features:
Long Time (LT)
Short Time (ST)
Instantaneous (I)
Ground Fault (GF)
Thermal Memory (for LT, ST, & GF)
Neutral Overload (NOL)
QUICK-TRIP Instantaneous (QT-I)
QUICK-TRIP Ground Fault (QT-GF)
Current Metering
Overload (Long Time pickup) Alarm
Instantaneous Override (I-OVRD)
(factory setting – normally disabled)
Instantaneous on Close (I-CLOS)
(factory setting – normally enabled)
The AC-PRO-II measures the true RMS current through
each of the breaker’s three poles.
AC-PRO-II settings include a Ground Fault type setting,
which allows the user to select either Residual Ground Fault
protection (vector sum), or Ground Return Ground Fault
protection (measures GF directly).
The QUICK-TRIP Instantaneous and QUICK-TRIP Ground
Fault protective settings are available to minimize downstream
Arc Flash Hazard.
The AC-PRO-II uses a unique algorithm to determine if the
RMS currents are greater than 12 times the CT rating where
the CTs may be saturated. The AC-PRO-II then corrects the
effect of CT saturation on the Long Time and Short Time trip
functions.
The AC-PRO-II can be provided with an optional Voltage
Divider Module (VDM) attached to the back of the trip unit.
When configured with the VDM, the AC-PRO-II offers the
following Voltage-based features:
•Rated for up to 600V three-phase systems
•Under-Voltage (Brown Out) trip & alarm
•Over-Voltage trip & alarm
•Voltage metering
•Power metering:
(KW, KVA, KWHr, KVAHr, Power Factor)
•VDM provides continuous trip unit power even when the
breaker is open and not carrying current, allowing for
communications, even without CT power.
In addition, the AC-PRO-II also features the following:
(features are standard for all AC-PRO-II trip units unless noted
otherwise)
•Configurable alarm relay (form C)
•Self-Test
•Front USB port for settings upload and download,
SAFE-T-TRIP remote trip device, auxiliary power and
firmware updates
•OLED multi-line display
•RS-485 Modbus RTU communications
•Versatile user settings provide more flexibility than the
original AC-PRO:
o50Hz or 60 Hz operation
oPhase CT secondary ratings:
1A, 0.5A, 0.4A, 0.25A, 0.2A
oNeutral CT secondary ratings:
2A, 1.5A, 1A, 0.5A, 0.4A, 0.25A, 0.2A, 0.18A
oGround Fault type can be set to “Residual” or
“Ground Return” depending on the CT location &
Ground Fault scheme.
•Compact form-factor allows the AC-PRO-II to be used on
a wide range of breakers, including more insulated case
breakers.
•Backwards compatibility with AC-PRO actuators, CT’s,
wiring harness, and settings.
•Waveform capture
•Sluggish Breaker
•Time-stamping of Trip events
The trip unit stores the trip history data for the last 8 trip
events and the trip log data in a non-volatile FRAM memory
for later recall. All the settings are stored in non-volatile
memory. Battery backup is not required.
The trip unit does not require external power to operate. Power
is derived from the current transformers (CTs). An internal
battery provides power to review and change protection
settings when CT power is not available.
The AC-PRO-II trip unit is manufactured under multiple
patents. See the link below for additional information:
http://www.utilityrelay.com/patents.html
1.0 Introduction and Product Overview
1.1 Current Protection and Functions
1.2 Voltage and Power Features - optional
Voltage Divider Module (VDM)
1.3 Additional Features

AC-PRO-II®Instruction Manual www.utilityrelay.com
Page 4
AC-PRO-II® is currently UL and ULC classified for use on
the following low voltage AC power circuit breakers:
Square D/Westinghouse DS-206, DS-416, DS-632
General Electric AKR-75
ITE K-600, K-800, K-3000
Siemens/Allis-Chalmers LA-1600
UL and ULC classification is in accordance with UL1066,
CSA C22.2, IEEE C37.59-2007 as well as appropriate
sections of ANSI C37.17-1979 and C37.50-1989.
The AC-PRO-II has the CE Mark.
AC-PRO-II was tested by an independent laboratory and
found in compliance with the following standards:
IEEE C37.90.1-2002, Surge Withstand
IEEE C37.90.2-2004, RF Susceptibility
EN 61000-4-3: 2006, RF Immunity
EN 61000-4-4: 2004, Fast Transient
EN 61000-4-5: 2006, Surge Immunity
EN 61000-4-2: 2009, Electrostatic Discharge Immunity
EN 55011: 2007, Radiated Emissions
The AC-PRO-II can be powered in 5 different ways: CTs,
internal battery, USB port, 24VDC auxiliary, or by the
Voltage Divider Module (VDM).
The AC-PRO-II is normally powered from the breaker phase
CT’s if at least one phase current is above the CT power-up
threshold.See Table 3-A for CT power-up values. If the
current is not high enough to power the trip unit, the trip unit
will power down. If the unit is powered down and a fault
occurs requiring rapid response, the high current of the fault
provides CT power and the trip unit performs as published in
the Time Current Curves.
If the trip unit is connected to a Voltage Divider Module
(VDM), USB, or 24VDC auxiliary power, these sources
provide constant power.
During normal operation (in service), if the trip unit is
powered by current or voltage and no errors are present, the
OK LED should be ON. If current is too low or if voltage (via
VDM) is not present, pressing the “DISPLAY” Push button
will temporarily power up the trip unit and display using the
internal battery. The OK LED should then be on.
The AC-PRO-II derives both the signal and power from the
breaker phase CTs. For 1-Amp CT’s, the trip unit will power-
up with less than 6% of the rated CT tap current through a
single CT. See complete table below:
Phase CT Secondary
Rating
Current required to power
AC-PRO-II
(in % of CT Primary Rating)
1.0 Amp
6%
0.5 Amp
12%
0.4 Amp
15%
0.25 Amp
24%
0.2 Amp
30%
0.18 Amp
33%
Table 3-A: CT Power-up values
A 3-Volt, 850 mAh, CR2, long life Lithium battery is used in
the trip unit. There are no restrictions on transport and no
special methods of disposal required with this battery.
The AC-PRO-II design uses the battery for the following
functions / features:
1) Allows the user to commission (program) the trip unit
without using the auxiliary power pack.
2) Allows the user to recall the last trip data even if the
breaker is open and without using the auxiliary power
pack.
3) Maintains the internal clock for accurate time and date
for time stamping the trip history and on-demand
waveforms.
4) Allows resetting (unlatching) the alarm relay when no
other power source is available.
Press the “DISPLAY” push button to turn the trip unit on
under battery power.
When on battery power, the trip unit will automatically turn
off 60 seconds after the last button is pushed to conserve
battery energy.
**** NOTE ****
The battery is NOT involved in the protective functions of
the trip unit. The trip unit will provide protection even if the
battery is removed.
The battery is NOT required for the trip unit to maintain
any of its memory including the user programmed pick-up
and delay settings and the last trip data.
If the battery voltage is low, the internal date/time clock
will not be correct.
See Section 21.0 for battery data and instructions on
replacing the battery.
The AC-PRO-II®is equipped with a mini-USB port on the
face of the trip unit and it can be used to power the trip unit
with the USB 5Vdc supplied by a computer, USB wall-pack,
etc.
The AC-PRO-II®includes a 24VDC auxiliary power input, for
connection to the B-292 Secondary Injection Test Set, and
other auxiliary power sources.
URC 24VDC Accessories:
24VDC wall-pack: URC Part # T-490-ASM
24VDC harness: URC Part #CA-AC2-24VDC
24VDC Auxiliary power requirements:
Voltage: 23-28VDC with correct polarity
Power supply sizing: 3 watts minimum per AC-PRO-II
Protection: protect each AC-PRO-II with 1A fuses
Use a minimum of 1 power supply per lineup.
Do not ground the minus of the 24VDC system
The AC-PRO-II®trip unit is available with an optional Voltage
Divider Module (VDM). The VDM provides breaker 3-Phase
voltage used for power information and also provides power
for the trip unit independently from the CTs. See Section 8.0
for more information on the Voltage Divider Module (VDM).
2.0 UL/ULC Classification & CE Mark
3.0 Trip Unit Power
3.1 Current Transformer (CT) Power
3.2 Battery Power
3.3 USB Power
3.4 24VDC Auxiliary Power
3.5 Voltage Divider Module (VDM) Power
(option)

AC-PRO-II® Instruction Manual www.utilityrelay.com
Page 5
Figure 4.1 AC-PRO-II Front View - Horizontal Configuration
A. Local Display (rotatable)
The Local Display is normally mounted to the trip
unit. It can be rotated or separated from the trip
unit for specific breakers where space is limited.
B. OLED Display
The display is normally off. Pushing the
“DISPLAY” button (C) turns on the display. The
OLED displays the following information. Refer to
Section 6.0 for menu navigation.
1) Power menu
2) Settings menu
3) Trip history menu
4) More Menu (Trip Unit info)
5) Errors, alarms, and other messages
C. DISPLAY Push Button
Pushing the “DISPLAY” button will turn on the
display. If no buttons are pushed for 60 seconds,
the display will turn off.
D. Removable wire cover
Cover with printed connection labels. See Section
5.0 for external connections (behind cover).
E. “Smart” Push Buttons
These push buttons perform the functions
indicated on the bottom of the OLED display.
These buttons are used for all menu navigation.
F. RS-485 Line Termination Switch
This switch should be placed in the ON position
only if the trip unit is the last in the RS-485
communications wiring run.
G. Red PICK-UP LED
This LED will illuminate if the current exceeds the
LT pick-up setting.
H. Green OK (Self-Test) LED
When the trip unit is powered up, this LED is on
unless a problem is detected. If the trip unit is not
powered up, the OK LED will not be on. If the
“DISPLAY” button is pressed, the OK LED should
come on, unless a problem is detected. See
Section 3.0 for Trip Unit Power and Section 20.0
for Errors.
I. Battery Cover
To replace the battery, remove the single screw
and slide battery cover out, remove the old battery
and insert a new CR2, 3-Volt Lithium battery.
Replace the battery cover and screw. See Section
21.0.
J. Mini-USB Port (shown with cover removed)
The electrically isolated mini-USB port is available
for connection to a laptop/ personal computer for
uploading & downloading of settings, information,
and firmware; SAFE-T-TRIP remote trip device
operation; or USB wall pack for auxiliary power.
K. COMM ACTIVE LED
The communications active LED illuminates when
the trip unit is transmitting information via
Communications.
L. AC-PRO-II Serial Number
4.0 AC-PRO-II® Pictures and Configurations
C
B
A
G
H
D
F
E
I
L
K
J

AC-PRO-II®Instruction Manual www.utilityrelay.com
Page 6
Figure 4.2: AC-PRO-II Front View - Vertical Configuration with Breaker Harness at bottom
Figure 4.3: AC-PRO-II Side View (without VDM)
AC-PRO-II Trip Unit
Local Display
Trip Unit Wire
Cover
D
A
F
J
I
B
C
E
H
G
K
L

AC-PRO-II® Instruction Manual www.utilityrelay.com
Page 7
Shown with VDM and wire cover Shown without VDM and without wire cover
Figure 4.4: AC-PRO-II Angled Views – with and without VDM
Breaker Harness Optional Neutral CT Cable Optional Communications Cable
and connector and connector assembly and connector assembly
Figure 4.5: AC-PRO-II connectors and cables
Voltage Divider
Module (VDM)
Connector
Covers

AC-PRO-II®Instruction Manual www.utilityrelay.com
Page 8
Figure 5.1: AC-PRO-II External Connections - Vertical Bottom Configuration
(Breaker Harness at bottom, shown with wiring cover off)
1. Auxiliary Terminal Block
a. Configurable alarm relay output
b. Ground Fault Defeat input
c. Breaker position contact input
2. QUICK-TRIP connector
3. 24VDC Auxiliary power connector
4. RS-485 Communications terminal block
5. Mini-USB port
6. Breaker wiring harness connection
5.0 External Connections
2
3
1
4
5
6