GE Zenith ZTS Series User manual

GE Digital Energy
Power Quality
Zenith ZTS Series
Low-Voltage Automatic and Manual Transfer Switches

PB-5066 •Page 2
Since its introduction, GE’s Zenith
ZTS Series of transfer switches has
become a hallmark of quality and
performance. Reliability resulting
from superior design and heavy duty
construction has made the ZTS the
industry standard for critical installa-
tions. Our emphasis on research and
development, design improvements,
materials, manufacturing methods,
quality assurance and service yields products that have
been proven in hundreds of thousands of applications.
Subsequent to the first ZTS units installed, our engineering
staffhas been dedicated to the improvement and
expansion of our line. Today, GE offers the widest
selection of transfer switch products worldwide.
•ZTS Automatic Transfer Switches
40-4000 Amps
•ZTSD Delayed Transition Transfer Switches
40-4000 Amps
•ZTSCT Closed Transition Transfer Switches
100-4000 Amps
•ZBTS Automatic Transition Bypass Switches
100-4000 Amps
•ZBTSD Delayed Transition Bypass Switches
100-4000 Amps
•ZBTSCT Closed Transition Bypass Switches
100-4000 Amps
All ZTS products meet or exceed industry requirements
allowing specification and installation confidence.
•UL 1008 listed through 480 VAC
•CSA C22.2 No. 178 listed through 600 VAC
•IEC 947-6-1 listed through 480 VAC
• Codes and Standards
NFPA 70, 99, 101, 110
IEEE 446, 241, 602
NEC 517, 700, 701, 702
NEMA ICS-10
• Controls tested in accordance with:
IEEE 472 (ANSI C37.90A)
EN55022 Class B (CISPR 22)
(Exceeds EN55011 & MILSTD 461 Class 3)
EN61000-4-2 Class B (Level 4)
EN61000-4-3 (ENV50140) 10 v/m
EN61000-4-4
EN61000-4-5, IEEE C62.41
(1.2 X 50μs, 0.5 to 4 kV)
 EN61000-4-6 (ENV50141)
 EN61000-4-11
•Equipment (Controls and Power Section)
Seismic Test Qualified to:
 IBC-2015
IEEE-693-2005
• Enclosures meet the requirements of:
UL 508, 50
ANSI C33.76
ICS 6
NEMA 250
• Quality System
ISO 9001 Registered
Specification Assistance
GE offers a complete range of product guide specifications to
help you determine your needs.
For more information, please consult your local GE representative,
our factory or our website at www.gepowerquality.com.
 EN55011 :2009+A1 :2010
• UL 1008 listed for Short Time rated 1600-3000A
(Non-bypass) ATS for 0.50 sec and 1.0 sec time duration

Zenith ZTS Series Automatic Transfer Switches
Universal Motor
Disconnect (UMD):
This load control discon-
nects a large motor via
its control circuit for an
adjustable period of time
prior to transfer in either
direction. For switching
multiple motors, GE’s
Accessory UMD discon-
nects the motors prior
to transfer and brings
them back on line
sequentially.
Accessory R50: This is
an in-phase monitor
that compares the phase
angle between both
sources of power and
prevents transfer until
the two are approximately
in phase (within a self-
adjusting range). GE’s high
speed transfer action,
coupled with the MX
series microprocessor
control logic, ensure
closures at or near zero
degree phase difference.
Series ZTSD:GE offers
delayed transition
switching on transfer
switches rated 40 amperes
and above – the GE Zenith
ZTSD Series. This pro-
grammed center-off
position allows for the
full decay of rotating
motors or transformer
fields. It can also be
used for load shedding
of selected circuits or
other applications which
require a means to dis-
connect the load from
either source. Major UPS
system manufacturers
recommend delayed
transition switches for
proper restart sequencing
of their systems.
Series ZTSCT:GE’s Zenith
series of closed transition
switches combine ZTSD
operation during a source
failure with a highly
engineered control system
that allows momentary
paralleling (100 ms) of
two acceptable sources,
thereby limiting the
impact of transfer
on the load.
Electrical Ratings
• Ratings 40 to 4000 amperes
• 2, 3 or 4 Poles
• Open type, NEMA 1, 3R, 4, 4X and 12
• Available to 600 VAC, 50 or 60 Hz
•Suitable for emergency and standby
applications on all classes of load, 100%
tungsten rated through 400 amps
• UL 1008 listed at 480 VAC
•CSA C22.2 No. 178 certified at 600 VAC
• IEC 947-6-1 listed at 480 VAC
Performance Features
•Contact transfer speed less than 100
milliseconds
• High close-in and withstand capability
•Temperature rise test per UL 1008
conducted after overload and endurance tests
- exceeds UL requirements
•Available in ZTS (utility-generator), ZTSU (utility-
utility), ZTSG (generator-generator) and ZTSM
(manual) configurations
Design and Construction Features
• Double throw, interlocked operation
•Electrically operated, mechanically held by a
simple, over-center mechanism
•Segmented silver tungsten alloy contacts
with separate arcing contacts on 225
amp and above
•Arc quenching grids, enclosed arc
chambers, and wide contact air gap for
superior source-to-source isolation on all
units
•Control circuit disconnect plug and drive
inhibit switch for safe maintenance
•Components accessible for inspection and
maintenance without removal of the switch
or power conductors
•Mechanical indicator and contact
chamber cover designed for inspection,
safety and position designation
Page 3 •PB-5066
The Zenith ZTS Series is the building block of our transfer switch
product line. This ruggedly built power contactor family of switches
has been specifically designed for transfer switch duty with
dependability, versatility and user friendliness of prime concern.
ZTS switches are available in open type construction for switchboard
installation or nema enclosed to the customer’s specifications. The
power panel components, consisting of power switching contacts,
drive mechanism and terminal lugs, are mounted on a specially
formed panel. Logic devices including microprocessor control
auxiliary time delays and special accessory equipment are
assembled on the door for ease of maintenance and separation
from the power section. They are connected with a numbered
wiring harness equipped with a disconnect plug that allows
isolation of the control panel for maintenance.
ZTS Series Method of Operation
When Source 1 voltage fails or drops to a predetermined point
(usually 80% of nominal), if required, a circuit is closed to start
the engine generator set. When Source 2 reaches 90% of rated
voltage and 95% of rated frequency, the drive solenoid is energized
through the Source 2 coil control relay, causing the main contacts to
disconnect the load from Source 1 and connect it to Source 2.
After the drive solenoid has completed its electrical stroke and
is seated, the Source 2 coil control relay opens to disconnect it. The
transfer switch is now mechanically locked in the Source 2 position.
When Source 1 voltage is restored to a predetermined point
(usually 90% of nominal), the control voltage sensing energizes.
The Source 1 side coil relay closes, and after the drive solenoid
has completed its electrical stroke and is seated, the coil control
relay opens to disconnect it. The transfer switch is now mechanically
locked in the Source 1 position.
Drive Mechanism
All Zenith ZTS switches employ the simple “over-center” principle to
achieve a mechanically locked position in either Source 1 or
Source 2 and GE’s high speed drive assures contact transfer in
100ms or less. High contact pressure and positive mechanical
lock allow for high withstand and closing ratings, far exceeding
UL requirements. All ZTS units are listed with UL time-based
rating, coordinated breaker and current limiting fuse ratings.
Open and Delayed Transition ATS mechanism does not allow
both sources to be connected at the same time.
Neutral Switching
The Zenith ZTS Series is available in true four pole designs for
multi-source power systems that require neutral switching. The
neutral contact is on the same shaft as the associated main contacts.
This ensures positive operation, and avoids any possibility that
the neutral contact will fail to open or close, as is possible when
the neutral pole is an add-on accessory. The neutral contacts
are identical to the main contacts, having the same current carrying
and high withstand/closing ratings as the mains. They are designed
to break last and make first to reduce the possibility of transients
while switching the neutral.
Safe Manual Operation
The ZTS manual operator consists of a large, easy-to-use handle
that fits securely for manual operation during installation and
maintenance or in an emergency.
The ZTS may be provided with an operator inhibit switch to dis-
connect the electrical drive prior to maintenance. Fully enclosed
wrap-around arc covers shield the main contacts and mechanical
components, preventing operator exposure during manual operation.
Transferring Large Motor or Highly Inductive Loads
Some loads, especially large motors, receive severe mechanical
stress if power is transferred out of phase while the motor is still
rotating. Also, back EMF generated by a motor may result in excess
currents that can blow fuses or trip circuit breakers. GE offers
four solutions to these problems:
•Short Time rated 1600-3000A (Non-
bypass) ATS for 0.50 sec and 1.0 sec time
duration
•Open Transition ATS perform break
before make operation on all phases

Enhanced Display and Settings
LEDs are used in a recognizable line configuration for continuous monitoring of switch
position. The LCD display shows source availability, exercise time delay operation and
system source condition. A simplified adjustment is featured for voltage, frequency and
time delay settings.
The control operates off a close differential 3-phase under-voltage sensing of Source 1,
factory standard setting 90% pickup, 80% dropout; under-frequency sensing of Source 1
factory setting 95% pickup; 3-phase voltage and frequency sensing of Source 2, factory
standard setting 90% pickup voltage, 95% pickup frequency. All factory settings are
operator adjustable.
A test function is standard (fast test/load/no load) to simulate Source 1 failure -
automatically bypassed should Source 2 fail.
Entelli-Switch 250
MOR E
LOAD DISCONNECT TD
PRE XFR
TIME REMAINING 04:02
MX250 Series Microprocessor Controller
PB-5066 •Page 4
More Enhanced Features
• Available in all transfer modes:
~ Open, Delayed & Bypass/Isolation
~ Closed (with newly integrated
transition control)
• User-friendly programmable engine
exerciser, used for the engine gen-
erator with or without load, at any
interval in a one-year period
•
Controller can be configured
to any voltages for worldwide
application
• Real-time display of ATS status,
including active timer(s)
• Multiple levels of user-defined
password protection
• Serial communications allowing
connectivity with other ATS's,
paralleling switchgear, and
SCADA systems
• Time-tested synchronous logic
automatically measures phase
angle and frequency allowing
disturbance-free transfer
• Unsurpassed statistical ATS/System
monitoring available in real-time
• T3/W3 elevator pre-signal.
Automatically bypassed if the
selected source fails, minimizing
time an elevator is without power
• Universal Motor Disconnect (UMD)
sends a pre-signal, post-signal or
both to any motor control center.
Not bypassed in an outage, the
UMD ensures safety in the event
of a single phase loss
• Voltage unbalance detection
standard
• Extensive 2/5/10 Warranty
Technical Benefits
• Separate line voltage components
for controller isolation
• Inputs optoisolated for high electrical
immunity to transients and noise
• Built-in electrical operator protection
• Simplified maintenance – major
components are easily replaceable
• Close differential under-voltage
sensing of the normal source
• Voltage and frequency sensing
of the emergency source
(all settings are adjustable)
Performance Features
•UL, CSA and IEC listed
• Ringing wave immunity per IEEE
472 (ANSI C37.90A)
• Conducted and Radiated Emissions
per EN55022 Class B
(CISPR 11) (Exceeds EN55011 &
MILSTD 461 Class 3)
•ESD Immunity test per EN61000-4-2
Class B (Level 4)
• Radiated RF, electromagnetic
field immunity test per
EN61000-4-3 (ENV50140) 10v/m
• Electrical fast transient/burst
immunity test for EN61000-4-4
• Surge immunity test per
EN61000-4-5 (IEEE C62.41)
(1.2 x 50μs, 0.5 to 4 kV)
• Conducted immunity test per
EN61000-4-6 (ENV50141)
•
Voltage dips and interruption
immunity EN55011 :2009+A1 :2010

Accessories
6P
A1
A1E
A3
A4
Calibrate
CDT
CDP
**DS
*DT
*DW
E
EL/P
K/P
L1
L2
L3
L4
*LNP
P1
Q2
Q3
Q7
R1-1
R1-3
R15
*R15D
R16
R50
S5P
S12P
S13P
T
T3/W3
U
UMD
VI
W
YEN
MSTD MEXE MCON MSEN MSPE MPSG
2
2
2
2
2
2
2
2
3
3
2
2
2
2
2
2
2
2
2
2
2
2
Group Packages
2
2
3
Standard Accessory included in the group package.
Optional Accessory not included but can be added to group package.
Optional Accessory. Can not be used with accessory having the same symbol.
N/A
Denotes an Accessory with 2 circuits as a standard.
Denotes an Accessory with 3 circuits as a standard.
* Delayed Transition Units Only.
** Optional for 40-400 Amp
Page 5 •PB-5066
Zenith ZTS Series Accessory Group MatrixZenith ZTS Series Accessory Definitions
6P
Microprocessor activated test switch (Momentary)
6A
Hardwired test switch (Maintained)
6AP
Microprocessor activated test switch (Maintained)
6B
Hardwired test switch (Maintained Auto - Momentary Test)
Key operated
6C
Hardwired test switch (Maintained Auto - Maintained Test)
Key operated
A1
Auxiliary Contact S.P.D.T. - Normal (Source 1) Failure
A1E
Auxiliary Contact S.P.D.T. - Emergency (Source 2) Failure
A3
Auxiliary Contact - closed in emergency (Source 2) Additional
available (10 max.) on ZTS Series and need to be specified
A4
Auxiliary Contact - closed in normal (Source 1) Additional available
(10 max.) on ZTS Series and need to be specified
AB3
Auxiliary Contact - closed in bypass emergency (Source 2) (S.P.D.T.)
(Standard up to 400A) Additional available (10 max.) on ZBTS
Series and need to be specified
AB4
Auxiliary Contact - closed in bypass normal (Source 1) (S.P.D.T.)
(Standard up to 400A) Additional available (10 max.) on ZBTS Series
and need to be specified
CALIBRATE
Microprocessor activated calibration feature
CDP
Programmable exerciser daily, 7/14/28/365 days user-selectable,
with or without load
CDT
Exerciser no load timer
CTAP
Chicago transfer alarm panel mounted in door of enclosure.
Includes 3 aux. contacts and fuse.
DS
Disconnect Switch. Disconnects source voltage to transfer power
panel.
DT (DELAYED TRANSITION ONLY)
Time Delay from Neutral Switch position to Source 1 on retransfer
DW (DELAYED TRANSITION ONLY)
Time Delay from Neutral Switch position to Source 2 on retransfer E
Engine Start Relay
ECM
Ethernet Communication Adapter. Requires MCM (Modbus) Accessory.
EL/P
Event log of last 16 events
F
Fan contact, closed when engine runs.
HT(1)(2)
Heater and Thermostat 208/240V (1) 380/600V (2) mounted and
interwired in enclosure. (requires larger enclosure for 40-200A)
K
Frequency Meter (Analog) - Door mounted
K/P
Frequency Indication on the controller
LNP
Center-off position LCD-Indicator
L1
LED light indicates Switch in Source 2 position
L2
LED light indicates Switch in Source 1 position
L3
LED light indicates Source 1 available
L4
LED light indicates Source 2 available
Zenith ZTS Series Accessory Definitions (cont.)

ZNET901A
Modbus Annunciator
M1
Single Phase Amp Meter (Analog)
M2
Three Phase Amp Meter (Analog)
M90
EPM2200 True RMS Digital Meter with display (Amps, Volts, Power,
Energy, Power Factory and Frequency). 3 Line LED Display. 50/60 Hz
Universal Operation. 1 or 3 phase. Standard Modbus RTU RS485
communications capability. 40 - 1200 Amps.
M90A
Adds Pre-Wiring for Enervista Viewpoint Monitoring of M90
Accessory & ATS Status using Modbus RS485 Serial Communications
M90B
Adds Pre-Wiring for Enervista Viewpoint Monitoring of M90
Accessory & ATS Status using Ethernet TCP/IP Communications
M91
EPM6000 True RMS Digital Meter with display (Amps, Volts,
Power, Energy, Power Factory and Frequency, THD). Certified
energy and demand metering. Meets ANSI C12.20 and IEC 687
Accuracy Classes. Front IrDA Port Laptop Connection. Standard
Modbus RTU RS485 or DNP 3.0 communications capability.
M91A
Adds Pre-Wiring for Enervista Viewpoint Monitoring of M91
Accessory & ATS Status using Modbus RS485 Serial Communications
M91B
Adds Pre-Wiring for Enervista Viewpoint Monitoring of M91
Accessory &ATS Status using Ethernet TCP/IP Communications
MCM
Modbus RTU Communication Module
N1
Running Time Indicator - Door mounted
N2
Operation Counter - Door Mounted
P1
Engine Start Timer (adjustable to 6 sec.)
P2
Engine Start Timer (adjustable to 300 sec.)
Q2
Peak shave/remote load test/area protection - Input Relay
(Need to specify voltage - 120 VAC, 24 VAC, 24 VDC - 120V
default standard)
Q3
Inhibit transfer to emergency (Source 2) Load add Input Relay
(Need to specify voltage - 120 VAC, 24 VAC, 24 VDC - 120V
default standard)
Q7
Inhibit transfer to normal (Source 1) - Input Relay (Need to
specify voltage - 120 VAC, 24 VAC, 24 VDC - 120V default standard)
R1-1/R1-3
Over Voltage sensing for normal (Source 1) single (R1-1) or
three (R1-3) phase
R15/R15D
Load Shed. Should Source 2 become overloaded, an external
signal can be given to ATS to transfer to the Neutral or dead
Normal (Source 1) position.
R16
Phase rotation sensing of Normal (Source 1) and Emergency (Source 2)
R50
In Phase monitor between Normal (Source 1) and Emergency
(Source 2) to allow transfer
S5P
Microprocessor programmable auto/manual retransfer selection
for transferring to Normal (Source 1) (includes controller softkey
for YN accessory)
S12P
Microprocessor programmable auto/manual transfer selection for
transferring to Normal (Source 1) and Emergency (Source 2)
(includes controller softkey for YN & YE accessory)
S13P
Microprocessor activated commit/no commit on transferring to
Emergency (Source 2) (with enable/disable settings)
S14
Keyed selector switch for retransfer to normal-test-auto
SW1
Auto/Off/Start Engine control selector - Door mounted
(keyed or non-keyed operation available)
SW2
Auto/Off Engine control selector - Door mounted
(keyed or non-keyed operation available)
SW3
Source Priority Selector Switch - Door mounted
Allows selection of Source 1 or Source 2 to be the Prime Source.
Transfer Switch will transfer to selected Prime Source if that
Source is available. (keyed or non-keyed operation available)
T
Retransfer to Normal (Source 1) adjustable time delay
T3/W3
Pre-signal contact on transfer to Normal (Source 1) or
Emergency (Source 2) during test
U
Engine stop /cool adjustable cool down timer
UMD/A62
Pre and post transfer output adjustable time range. Functions in
both directions. Includes 2 circuits. (Additional circuits available).
VI
Voltage imbalance between phases (3 Phase only)
W
Adjustable time delay on transfer to Emergency (Source 2) YEN/
YER
Bypass transfer timers function (soft key switch in microprocessor)
Zenith ZTS Series Accessory Definitions (cont.)
PB-5066 •Page 6

1. Metric dimensions (cm) and weights (Kg) shown in parenthesis adjacent
to English measurements in inches and pounds.
2. Includes 1.25" door projection beyond base depth. Allow a minimum of 3"
additional depth for projection of handle, light, switches, pushbuttons, etc.
3. All dimensions and weights are approximate and subject to change without notice.
4. Special enclosures (NEMA 3R, 4, 12, etc.) dimensions and layout may differ.
Consult the GE factory for details.
5. Normal and emergency may be ordered inverted on any switch. The load
may be inverted 600-1200 amps. Consult the GE factory for details.
6. Special lug arrangements may require different enclosure dimensions.
For certified drawings, contact the GE factory.
7. Packing materials must be added to weights shown. Allow 15% additional
weight for cartons, skids, crates, etc.
8. Add 4" in height for removable lifting lugs.
9. Lug adapters for 3000-4000 amp limits may be staggered length for ease
of entrance. Consult the GE factory for details.
10.
Louvers must be clear for airflow with standard cable connections.
11. A ZTS 40-150A, when ordered with the following options, will require a larger
enclosure: UMD, Digital Meter, HT, HH, K,LDS,L11, N1, N2, OCVR-1SG, OCVR-1SS,
P2, SPD, BCI, R26(D). Please contact the GE factory for dimensions.
12. For Delayed and Closed Transition dimensions and weights, refer to GE Publication
PB-5067 and PB-5069.
13. For Bypass/Isolation dimensions and weights, refer to GE Publication PB-5068.
14. AZTS, when ordered with compression lugs suitable for use with copper cables, will
require a larger enclosure. For 40-225A, the enclosure is 46" x 24" x 14" (HxWxD). For
260-400A, the enclosure is 66" x 24" x 19.75" (HxWxD). For 600A, the enclosure is 74" x
40" x 19.75" (HxWxD). For certified drawings, please contact the GE factory.
Application Notes:
NOTES:
*Line and load terminals are located in rear
and arranged for bus bar connection. Terminal
lugs are available as an accessory. Contact
the GE factory for more details.
1. Special terminal lugs and neutral bars are
available at additional cost. Contact factory
and advise cable sizes and number of
conductors per pole.
2. Fully rated neutral provided on 3 phase,
4 wire system.
3. Special lug arrangements may require different
enclosure dimensions. For certified drawings,
contact the GE factory.
C
A
B
Figure A
C
A
B
Figure B
C
A
B
Figure C
Zenith ZTS Series Dimensional Specifications / Power Connection Terminals
ZTS Model, Dimensions and Weights
Ampere
Rating Poles
NEMA 1 Weight Application
Notes
Height
(A)
Width
(B)
Depth
(C)
Reference
Figure
Open
Type NEMA 1
40, 80,
100, 150
2, 3
24 (61) 18 (46) 11 (28)
A
21 (10)
57 (26)
1 - 7, 11-14
460 (27)
225, 260, 400
2, 3
46 (117) 24 (61) 14 (36)
70 (32) 165 (75)
1 - 7, 12-14
475 (34) 170 (68)
600 2, 3
74 (188) 40 (102) 19.5 (50) B
165 (75) 380 (172) 1 - 8, 12-14
4185 (84) 430 (195)
800, 1000, 1200 2, 3 190 (86) 455 (206) 1 - 8, 12-13
4210 (95) 540 (245)
1600, 2000 3
90 (229) 35.5 (90) 48 (122)
C
740 (336) 1375 (624)
1 - 13
4
830 (376) 1480 (671
3000 3
740 (336) 1375 (624)
4
830 (376) 1480 (671)
4000 390 (229) 46.5 (118) 60 (152) 770 (349) 1595 (723)
41025 (465) 1850 (839)
AL-CU UL Listed Solderless
Screw-Type Terminals for External Power Connections
Switch
Size
Amps
Normal, Emergency &
Load Terminals Switch
Size
Amps
Normal, Emergency &
Load Terminals
Cables/
Pole Wire Ranges Cables/ Pole Wire Ranges
40-80 1 #8 to 3/0 600 2 #2 to 600 MCM
100, 150 1#6 to 250 MCM 800, 1000, 1200 4
#2 to 600 MCM
225, 260,
400
1 #4 to 600 MCM 1600, 2000,
3000, 4000 *
1/O to 250 MCM
2
Page 7 •PB-5066

MODEL/TYPE AMPERE SIZE SWITCHED
POLES
ENCLOSURE TYPE OPERATIONAL VOLTAGE ACCESSORIES
AB
Consult Table Below
Type 1 Enclosure
Open Style Unit
B
2 Poles
F
4 Poles
E
3 Poles
B0
Z B 0Z E C Z V C
TD
S
M
CONTROL
PANEL
Switch Types
•Standard: Unless otherwise noted, the
standard switch with quick transfer will
be supplied.
•Delayed Transition: When ordered as
the ZTSD, the delayed transition switch
offers time delay during transfer from one
position to the other. This is primarily for
transfer of large motor or inductive loads.
•Closed Transition: When ordered as the
ZTSCT, the closed transition switch offers
two basic modes of operation. During
a failure of one source or an out of specifi-
cation condition, the ZTSCT Model oper-
ates as a standard delayed transition
switch (ZTSD Model). This sequence allows
clear separation of an unreliable source
from an available one.
•Bypass: When ordered as the ZBTS, the
bypass transition switch offers a draw-out
mechanism, with electrical and mechanical
interlocks for secure removal after load
bypass. In this way the transfer switch
and/or the control panel may be tested,
isolated and removed for maintenance
without load interruption.
Then choose
additional accessories
APPLICATION
0
Utility - Generator
M
Manual
G
Gen to Gen
U
Utility - Utility
Type 4 Enclosure
Type 12 Enclosure
Type 4X Enclosure
Type 3R Enclosure
0 1
1 2
3 R
4 0
4 X
0 0
A B Voltage Phase Config. Hz
1 0 120 1 2 wire 60
2 0 120/240 1 3 wire 60
2 2 110/220 1 3 wire 50
3 0 240 3 3 wire 60
3 1 208 3 3 wire 60
3 2 220 3 3 wire 50
3 5 139/240 3 4 wire 60
4 0 120/208 3 4 wire 60
4 1 127/220 3 4 wire 60
4 2 127/220 3 4 wire 50
5 0 480 3 3 wire 60
5 1 440 3 3 wire 60
5 2 440 3 3 wire 50
5 5 460 1 3 wire 50
5 7 480 1 2 wire 60
5 8 254/440 3 4 wire 60
6 0 575 3 3 wire 60
6 1 347/600 3 4 wire 60
6 3 575 1 2 wire 60
7 0 277/480 3 4 wire 60
7 1 277 1 2 wire 60
7 4 266/460 3 4 wire 60
7 5 460 3 3 wire 60
8 2 380 1 2 wire 50
9 0 240/416 3 4 wire 60
9 1 220/380 3 4 wire 60
9 2 220/380 3 4 wire 50
9 3 240/416 3 4 wire 50
9 7 380 3 3 wire 60
Note: Operating voltage must be specified at time of
order. Only the most common voltages are shown above.
XE
E
M
ON
C
M
EN
S
M
PE
S
M
SG
P
M
N0
A
M
Zenith ZTS Series Ordering Information
Entelli-Switch 250
B1
Horizongal bypass
unit with MX250
Microprocessor
Control Unit
Example
ZTSCT0B00040F-ZEC01ZVC40MSTD
This number string shows the correct format
for a ZTS Model Automatic Transfer Switch
with closed transition, an Entelli-Switch
250 microprocessor control unit, Utility -
Generator, 400 amps, 4 pole, NEMA Type 1
enclosure, 120/208V 3φ, 4 wire, 60 Hz system
with the standard group of accessories.
*Available only on Bypass configuration
Available for 1600-3000A Non-bypass product ONLY.
UL 1008
Withstand
and Closing
Ratings
Please refer to
GE Publication
TB-1102.
GE Digital Energy – Power Quality
830 W 40 th Street, Chicago, IL 60609 USA
800 637 1738 www.gepowerquality.com
Information subject to change without notice. Please verify all details with GE.
PB-5066 (12/09) © 2018 General Electric Company All Rights Reserved
Standard (Open Transition)
Z T S 0 0 0
Z T S D 0 0
Z T S C T 0
Z B T S 0 0
Delayed Transition
Closed Transition
Standard (Open Transition) w/Bypass
Z B T S D 0
Delayed Transition w/Bypass
Z B T S C T
Closed Transition w/Bypass
40 amps
004
80 amps
008
100 amps
010
150 amps
015
225 amps
022
260 amps
026
400 amps
040
600 amps
060
800 amps
080
1000 amps
100
1200 amps
120
1600 amps
160
2000 amps
200
3000 amps
300
2600 amps
260
4000 amps
400
Assembled in the USA
*
B 4
High withstand panel
with MX250
**
**