VLT MCD 500 User manual

MAKING MODERN LIVING POSSIBLE
Operating Instructions
VLT®Soft Starter - MCD 500

Contents
1 Safety 5
1.1 Safety 5
2 Introduction 7
2.1.1 Feature List 7
2.1.2 Type Code 8
3 Installation 9
3.1 Mechanical Installation 9
3.2 Dimensions and Weights 10
4 Electrical Installation 11
4.1.1 Control Wiring 11
4.1.2 Control Terminals 11
4.1.3 Remote Inputs 11
4.1.4 Serial Communication 12
4.1.5 Earth Terminal 12
4.1.6 Power Terminations 12
4.2 Motor Connection 13
4.2.1 Testing the Installation 13
4.2.2 In-line Installation 14
4.2.2.1 In-line Installation, Internally Bypassed 14
4.2.2.2 In-line Installation, Non-bypassed 14
4.2.2.3 In-line Installation, Externally Bypassed 14
4.2.3 Inside Delta Installation 15
4.2.3.1 Inside Delta Installation, Internally Bypassed 15
4.2.3.2 Inside Delta Installation, Non-bypassed 15
4.2.3.3 Inside Delta Installation, Externally Bypassed 15
4.3 Current Ratings 16
4.3.1 In-line Connection (Bypassed) 17
4.3.2 AC-53 Rating for Bypassed Operation 17
4.3.3 In-line Connection (Non-bypassed/Continuous) 18
4.3.4 AC-53 Rating for Continuous Operation 18
4.3.5 Inside Delta Connection (Bypassed) 19
4.3.6 AC-53 Rating for Bypassed Operation 19
4.3.7 Inside Delta Connection (Non-bypassed/Continuous) 20
4.3.8 AC-53 Rating for Continuous Operation 20
4.4 Minimum and Maximum Current Settings 21
4.5 Bypass Contactor 21
4.6 Main Contactor 21
Contents MCD 500 Operating Instruction
MG17K402 - VLT®is a registered Danfoss trademark 1

4.7 Circuit Breaker 21
4.8 Power Factor Correction 22
4.9 Fuses 22
4.9.2 Bussman Fuses - Square Body (170M) 23
4.9.3 Bussman Fuses - British Style (BS88) 24
4.9.4 Ferraz Fuses - HSJ 25
4.9.5 Ferraz Fuses - North American Style (PSC 690) 26
4.9.6 UL Tested Fuses - Short Circuit Ratings 27
4.10 Schematic Diagrams 28
4.10.1 Internally Bypassed Models 28
4.10.2 Non-bypassed Models 29
5 Application Examples 30
5.1 Motor Overload Protection 30
5.2 AAC Adaptive Acceleration Control 30
5.3 Starting Modes 31
5.3.1 Constant Current 31
5.3.2 Current Ramp 31
5.3.3 AAC Adaptive Acceleration Control 31
5.3.4 Kickstart 32
5.4 Stopping Modes 32
5.4.1 Coast to Stop 32
5.4.2 TVR Soft Stop 32
5.4.3 AAC Adaptive Acceleration Control 33
5.4.4 Brake 33
5.5 Jog Operation 34
5.6 Inside Delta Operation 35
5.7 Typical Start Currents 35
5.8 Installation with Main Contactor 38
5.9 Installation with Bypass Contactor 39
5.10 Emergency Run Operation 40
5.11 Auxiliary Trip Circuit 41
5.12 DC Brake with External Zero Speed Sensor 42
5.13 Soft Braking 42
5.14 Two Speed Motor 44
6 Operation 46
6.1 Operation and LCP 46
6.1.1 Operating Modes 46
6.2 Remote Mounted LCP 46
6.2.1 Synchronising the LCP and the Starter 47
Contents MCD 500 Operating Instruction
2 MG17K402 - VLT®is a registered Danfoss trademark

6.3 Welcome Screen 47
6.4 Control Methods 47
6.5 Local Control Buttons 48
6.6 Displays 48
6.6.1 Temperature Monitoring Screen (S1) 48
6.6.2 Programmable Screen (S2) 48
6.6.3 Average Current (S3) 48
6.6.4 Current Monitoring Screen (S4) 49
6.6.5 Frequency Monitoring Screen (S5) 49
6.6.6 Motor Power Screen (S6) 49
6.6.7 Last Start Information (S7) 49
6.6.8 Date and Time (S8) 49
6.6.9 SCR Conduction Bargraph 49
6.6.10 Performance Graphs 49
7 Programming 50
7.1 Access Control 50
7.2 Quick Menu 51
7.2.1 Quick Setup 51
7.2.2 Application Setups 52
7.2.3 Loggings 53
7.3 Main Menu 53
7.3.1 Parameters 53
7.3.2 Parameter Shortcut 53
7.3.3 Parameter List 54
7.4 Primary Motor Settings 55
7.4.1 Brake 56
7.5 Protection 56
7.5.1 Current Imbalance 56
7.5.2 Undercurrent 57
7.5.3 Instantaneous Overcurrent 57
7.5.4 Frequency Trip 57
7.6 Inputs 58
7.7 Outputs 59
7.7.1 Relay A Delays 59
7.7.2 Relays B and C 59
7.7.3 Low Current Flag and High Current Flag 60
7.7.4 Motor Temperature Flag 60
7.7.5 Analog Output A 60
7.8 Start/Stop Timers 60
7.9 Auto-Reset 61
Contents MCD 500 Operating Instruction
MG17K402 - VLT®is a registered Danfoss trademark 3

7.9.1 Auto-Reset Delay 61
7.10 Secondary Motor Set 61
7.11 Display 63
7.11.1 User Programmable Screen 63
7.11.2 Performance Graphs 64
7.12 Restricted Parameters 65
7.13 Protection Action 66
7.14 Factory Parameters 66
8 Tools 67
8.1 Set Date and Time 67
8.2 Load/Save Settings 67
8.3 Reset Thermal Model 67
8.4 Protection Simulation 68
8.5 Output Signal Simulation 68
8.6 Digital I/O State 68
8.7 Temp Sensors State 68
8.8 Alarm Log 69
8.8.1 Trip Log 69
8.8.2 Event Log 69
8.8.3 Counters 69
9 Troubleshooting 70
9.1 Trip Messages 70
9.2 General Faults 73
10 Specifications 75
10.1 Accessories 76
10.1.1 LCP Remote Mounting Kit 76
10.1.2 Communication Modules 76
10.1.3 PC Software 77
10.1.4 Finger Guard Kit 77
10.1.5 Surge Protection Kit (Lightning Protection) 77
11 Bus Bar Adjustment Procedure (MCD5-0360C - MCD5-1600C) 78
Contents MCD 500 Operating Instruction
4 MG17K402 - VLT®is a registered Danfoss trademark

1 Safety
1.1 Safety
When reading this manual you will come across different
symbols that require special attention. The symbols used
are the following:
NOTE
Indicates something to be noted by the reader
CAUTION
Indicates a general warning
WARNING
Indicates a high voltage warning
The examples and diagrams in this manual are included
solely for illustrative purposes. The information contained
in this manual is subject to change at any time and
without prior notice. In no event will responsibility or
liability be accepted for direct, indirect or consequential
damages resulting from the use or application of this
equipment.
NOTE
Before changing any parameter settings, ensure that the
current parameter set is saved to an internal file. Refer to
MCD 500 Operating Instructions, MG.17.KX.YY, for more
information.
WARNING
WARNING - ELECTRICAL SHOCK HAZARD
MCD 500 soft starters contain dangerous voltages when
connected to mains voltage. Only a competent electrician
should carry out the electrical installation. Improper instal-
lation of the motor or the soft starter may cause
equipment failure, serious injury or death. Follow this
manual and local electrical safety codes.
Models MCD5-0360C - MCD5-1600C: The bus bar and
heatsink are live while the unit is operating (starting,
running or stopping). If the starter is installed without a
main contactor, the bus bar and heatsink are live
whenever mains voltage is connected (including when the
starter is ready or tripped).
WARNING
Disconnect the soft starter from mains voltage before
carrying out repair work.
It is the responsibility of the user or person installing the
soft starter to provide proper grounding and branch circuit
protection according to local electrical safety codes.
Do not connect power factor correction capacitors to the
output of MCD 500 soft starters. If static power factor
correction is employed, it must be connected to the supply
side of the soft starter.
MCD5-0021B - MCD5-0105B: After transportation,
mechanical shock or rough handling there is possibility
that the bypass contactor may have latched into the on
state. To prevent the possibility of the motor starting
immediately, on first commissioning or operation after
transportation, always ensure that the control supply is
applied before the power, so that the contactor state is
initialised.
WARNING
Safety of Personnel
The soft starter is not a safety device and does not provide
electrical isolation or disconnection from the supply.
•If isolation is required, the soft starter must be
installed with a main contactor
•The start and stop functions of the soft starter
must not be relied upon for personnel safety. A
motor may start or stop unexpectedly if faults
occur in the mains supply, the motor connection,
or the electronics of the soft starter.
To provide machine or personnel safety, the isolation
device must be controlled through an external safety
system.
In Auto On mode, the motor can be stopped using digital
or bus commands while the soft starter is connected to
mains.
CAUTION
These stop functions are not sufficient to avoid unintended
start.
A motor that has been stopped may start if faults occur in
the electronics of the soft starter, or a temporary fault in
the supply mains or the motor connection ceases.
CAUTION
Use the auto-start feature with caution. Read all the notes
related to auto-start before operation.
Safety MCD 500 Operating Instruction
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11

Equipment containing electrical
components may not be disposed of
together with domestic waste.
It must be collected separately as
electrical and electronic waste
according to local and currently valid
legislation.
Table 1.1
Safety MCD 500 Operating Instruction
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11

2 Introduction
The MCD 500 is an advanced digital soft start solution for
motors from 7 kW to 800 kW. MCD 500 soft starters
provide a complete range of motor and system protection
features and have been designed for reliable performance
in the most demanding installation situations.
2.1.1 Feature List
Models for all connection requirements
•21 A to 1600 A (in-line connection)
•In-line or inside delta connection
•Internally bypassed up to 215 A
•Mains voltage: 200 - 525 VAC or 380 - 690 VAC
•Control voltage: 24 VAC/VDC, 110 - 120 VAC or
220 - 240 VAC
User-friendly LCP
•Loggings
•Real-time graphs
•SCR conduction bar graph
Tools
•Application setups
•Date and time stamped event log with 99 entries
•8 most recent trips
•Counters
•Protection simulation
•Output signal simulation
Inputs and Outputs
•Local or remote control input options
(3 x fixed 1 x programmable)
•Relay outputs (3 x programmable)
•Analog programmable output
•24 VDC 200 mA supply output
Start and run modes
•AAC - Adaptive Acceleration Control
•Constant current
•Current ramp
•Kickstart
•Jog
•Emergency run operation
Stop modes
•AAC - Adaptive Acceleration Control
•Timed voltage ramp soft stop
•DC brake
•Soft brake
•Emergency stop
Other features
•Auto start/stop timer
•Second order thermal model
•Battery backup of clock and thermal model
•Optional DeviceNet, Modbus or Profibus
communication modules
Comprehensive protection
•Wiring/Connection/Supply
-Motor connection
-Phase sequence
-Power loss
-Individual phase loss
-Mains frequency
•Current
-Excess start time
-Current imbalance
-Undercurrent
-Instantaneous overcurrent
•Thermal
-Motor thermistor
-Motor overload
-Bypass relay overload
-Heatsink temperature
•Communication
-Network comms
-Starter comms
•External
-Input trip
•Starter
-Individual shorted SCR
-Battery/Clock
Introduction MCD 500 Operating Instruction
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22

2.1.2 Type Code
MCD 5 - - - -
Current rating
0021 = 21 A, AC53b 3-30:330
0037 = 37 A, AC53b 3-30:330
0043 = 43 A, AC53b 3-30:330
0053 = 53 A, AC53b 3-30:330
0068 = 68 A, AC53b 3-30:570
0084 = 84 A, AC53b 3-30:570
0089 = 89 A, AC53b 3-30:570
0105 = 105 A, AC53b 3-30:570
0131 = 131 A, AC53b 3-30:570
0141 = 141 A, AC53b 3-30:570
0195 = 195 A, AC53b 3-30:570
0215 = 215 A, AC53b 3-30:570
0245 = 245 A, AC53a 3-30:50-6
0360 = 360 A, AC53a 3-30:50-6
0380 = 380 A, AC53a 3-30:50-6
0428 = 428 A, AC53a 3-30:50-6
0595 = 595 A, AC53a 3-30:50-6
0619 = 619 A, AC53a 3-30:50-6
0790 = 790 A, AC53a 3-30:50-6
0927 = 927 A,AC53a 3-30:50-6
1200 = 1200 A, AC53a 3-30:50-6
1410 = 1410 A, AC53a 3-30:50-6
1600 = 1600 A, AC53a 3-30:50-6
Mains voltage
T5 = 200 - 525 VAC
T7 = 380 - 690 VAC
IP rating
00 = IP00
20 = IP20
Control voltage
CV1 = 24 VAC/VDC
CV2 = 110-120 VAC or 220-240 VAC
B = Bypassed
C = Non-bypassed
Frame size
G1 = 0021 ~ 0105 A
G2 = 0131 ~ 0215 A
G3 = 0245 A
G4 = 0360 A ~ 0927 A
G5 = 1200 A ~ 1600 A
Not used
= Not selectable
177HA382.11
Illustration 2.1
Introduction MCD 500 Operating Instruction
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22

3 Installation
3.1 Mechanical Installation
Illustration 3.1
1MCD5-0021B - MCD5-0245C: Allow 100 mm (3.94 inches) between soft starters.
MCD5-0360C - MCD5-1600C: Allow 200 mm (7.88 inches) between soft starters.
2MCD5-0021B - MCD5-0215B: Allow 50 mm (1.97 inches) between the soft starter and solid surfaces.
MCD5-0245C: Allow 100 mm (3.94 inches) between the soft starter and solid surfaces.
MCD5-0360C - MCD5-1600C: Allow 200 mm (7.88 inches) between the soft starter and solid surfaces.
3The soft starter may be mounted on its side. Derate the soft starter's rated current by 15%.
4Soft starters may be mounted side by side with clearance of 50 mm (1.97 inches) on both sides.
Table 3.1
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33

3.2 Dimensions and Weights
177HA514.10
Illustration 3.2
Model A mm
(inches)
B mm
(inches)
C mm
(inches)
D mm
(inches)
E mm
(inches)
Weight kg
(lbs)
MCD5-0021B
295
(11.6)
278
(10.9)
150
(5.9)
124
(4.9)
183
(7.2)
4.2
(9.3)
MCD5-0037B
MCD5-0043B
MCD5-0053B
MCD5-0068B
213
(8.14)
4.5
(9.9)
MCD5-0084B 4.9
(10.8)
MCD5-0089B
MCD5-0105B
MCD5-0131B
438
(17.2)
380
(15.0)
275
(10.8)
248
(9.8)
250
(9.8)
14.9
(32.8)
MCD5-0141B
MCD5-0195B
MCD5-0215B
MCD5-0245C 460
(18.1)
400
(15.0)
390
(15.4)
320
(12.6)
279
(11.0)
23.9
(52.7)
MCD5-0360C
689
(27.1)
522
(20.5)
430
(16.9)
320
(12.6)
300.2
(11.8)
35
(77.2)
MCD5-0380C
MCD5-0428C
MCD5-0595C
45
(99.2)
MCD5-0619C
MCD5-0790C
MCD5-0927C
MCD5-1200C 856
(33.7)
727
(28.6)
585
(23.0)
500
(19.7)
364
(14.3)
120
(264.6)
MCD5-1410C
MCD5-1600C
Table 3.2
Installation MCD 500 Operating Instruction
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3
3

4 Electrical Installation
4.1 Electrical Installation
4.1.1 Control Wiring
The soft starter can be controlled in three ways
•using the buttons on the LCP
•via remote inputs
•via a serial communication link
The MCD 500 will always respond to a local start or stop
command (via the [Hand On] and [Off] buttons on the
LCP). Pressing the [Auto On] button selects remote control
(the MCD 500 will accept commands from the remote
inputs). In remote mode, the Auto On LED will be on. In
local mode, the Hand On LED will be on if the MCD 500 is
starting or running and the Off LED will be on if the MCD
500 is stopped or stopping.
4.1.2 Control Terminals
Control terminations use 2.5 mm2plug-in terminal blocks.
Different models require control voltage to different
terminals:
CV1 (24 VAC/VDC): A5, A6
CV2 (110 - 120 VAC): A5, A6
CV2 (220 - 240 VAC): A4, A6
Illustration 4.1
NOTE
Do not short terminals 05, 06 without using a thermistor.
All control terminals and relay terminals comply with SELV
(Protective Extra Low Voltage). This protection does not
apply to grounded Delta leg above 400 V.
To maintain SELV, all connections made to the control
terminals must be PELV (eg. thermistor must be reinforced/
double insulated from motor).
NOTE
SELV offers protection by way of extra low voltage.
Protection against electric shock is ensured when the
electrical supply is of the SELV type and the installation is
made as described in local/national regulations on SELV
supplies.
NOTE
Galvanic (ensured) isolation is obtained by fulfilling
requirements for higher isolation and by providing the
relevant creepages/clearance distances. These requirements
are described in the IEC61140 standard.
The components that make up the electrical isolation also
comply with the requirements for higher isolation and the
relevant test as described in IEC61140.
4.1.3 Remote Inputs
The MCD 500 has three fixed inputs for remote control.
These inputs should be controlled by contacts rated for
low voltage, low current operation (gold flash or similar).
177HA504.10
Start/stop
Reset
Start
Stop
Reset
Start
Stop
Reset
15
16
17
18
25
18
15
16
17
18
25
18
15
16
17
18
25
18
23
1
Illustration 4.2
1 Two-wire control
2 Three-wire control
3 Four-wire control
Table 4.1
The reset input can be normally open or normally closed.
Use 3-8 Remote Reset Logic to select the configuration.
CAUTION
Do not apply voltage to the control input terminals. These
are active 24 VDC inputs and must be controlled with
potential free contacts.
Cables to the control inputs must be segregated from
mains voltage and motor cabling
Electrical Installation MCD 500 Operating Instruction
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44

4.1.4 Serial Communication
Serial communication is always enabled in local control
mode, and can be enabled or disabled in remote control
mode (see 3-2 Comms in Remote).
4.1.5 Earth Terminal
Earth terminals are located at the back of the soft starter.
•MCD5-0021B - MCD5-0105B have one terminal, on the input side.
•MCD5-0131B - MCD5-1600C have two terminals, one on the input side and one on the output side.
4.1.6 Power Terminations
Use only copper stranded or solid conductors, rated for 75°C.
NOTE
Some units are aluminium bus bars. When connecting power terminations, we recommend cleaning the surface contact
area thoroughly (using an emery or stainless steel brush) and using an appropriate jointing compound to prevent corrosion.
MCD5-0021B - MCD5-0105B MCD5-0131B MCD5-0141B - MCD5-0215B
Table 4.2
MCD5-0245C MCD5-0360C - MCD50927C MCD5-1200C - MCD5-1600C
Table 4.3
Electrical Installation MCD 500 Operating Instruction
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44

The bus bars on models MCD5-0360C - MCD5-1600C can be adjusted for top or bottom input and output as required. For
step-by-step instructions on adjusting the bus bars, refer to the supplied insert.
177HA542.11
Illustration 4.3
I/O Input/Output
I Input
O Output
Table 4.4
4.2 Motor Connection
MCD 500 soft starters can be connected to the motor in-
line or inside delta (also called three-wire and six-wire
connection). The MCD 500 will automatically detect the
motor connection and perform the necessary calculations
internally, so it is only necessary to program the motor full
load current (1-1 Motor FLC).
NOTE
For personnel safety, the power terminals on models up to
MCD5-0105B are protected by snap-off tabs. When using
large cables, it may be necessary to break off these tabs.
Models which are internally bypassed do not require an
external bypass contactor.
4.2.1 Testing the Installation
The MCD 500 can be connected to a small motor for
testing. During this test, the soft starter's control input and
relay output protection settings can be tested. This test
mode is not suitable for testing soft starting or soft
stopping performance.
The minimum motor FLC for test purposes is 2% of the
soft starter's minimum FLC (see 4.4 Minimum and Maximum
Current Settings).
NOTE
When testing the soft starter with a small motor, set 1-1
Motor FLC to the minimum allowable value.
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44

4.2.2 In-line Installation
4.2.2.1 In-line Installation, Internally
Bypassed
177HA430.11
M
3
6/T3
2/T1
5/L3
3/L2
1/L1
13
14
4/T2
E
KM1
KM1 F1
Illustration 4.4
KM1 Main contactor (optional)
F1 Fuses (optional)
Table 4.5
4.2.2.2 In-line Installation, Non-bypassed
177HA429.11
6/T3
2/T1
5/L3
3/L2
1/L1
13
14
4/T2
E
KM1
KM1 F1
M
3
Illustration 4.5
KM1 Main contactor (optional)
F1 Fuses (optional)
Table 4.6
4.2.2.3 In-line Installation, Externally
Bypassed
Non-bypassed models have dedicated bypass terminals,
which allow the soft starter to continue providing
protection and monitoring functions even when bypassed
via external contactor. The bypass contactor must be
connected to the bypass terminals and controlled by a
programmable output configured to Run (see parameters
4.1 thorugh 4.9).
NOTE
The bypass terminals on MCD5-0245C are T1B, T2B, T3B.
The bypass terminals on MCD5-0360C ~ MCD5-1600C are
L1B, L2B, L3B.
NOTE
The fuses can be installed on the input side if required.
177HA617.10
M
3
F1
6/T3
2/T1
5/L3
3/L2
1/L1
13
14
4/T2
E
KM1
KM1
T1B
T2B
T3B
KM2
34
33
KM2
Illustration 4.6 MCD5-0245C
KM1 Main contactor
KM2 Bypass contactor (external)
F1 Semiconductor fuses (optional)
Table 4.7
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44

177HA431.11
M
3
F1
6/T3
2/T1
5/L3
3/L2
1/L1
13
14
4/T2
E
KM1
KM1
L1B
L2B
L3B
KM2
34
33
KM2
Illustration 4.7 MCD5-0360C ~ MCD5-1600C
KM1 Main contactor
KM2 Bypass contactor (external)
F1 Semiconductor fuses (optional)
Table 4.8
4.2.3 Inside Delta Installation
CAUTION
When connecting the MCD 500 in inside delta configu-
ration, always install a main contactor or shunt trip circuit
breaker.
NOTE
When connecting in inside delta, enter the motor full load
current (FLC) for 1-1 Motor FLC. MCD 500 software
calculates inside delta currents from this. 15-7 Motor
Connection is set to Auto detect as default and can be set
to force the soft starter inside delta or in-line.
4.2.3.1 Inside Delta Installation, Internally
Bypassed
Illustration 4.8
KM1 Main contactor
F1 Fuses (optional)
Table 4.9
4.2.3.2 Inside Delta Installation, Non-
bypassed
177HA500.11
M
3
6/T3
2/T1
5/L3
3/L2
1/L1
13
14
4/T2
KM1
KM1 F1
U1(1) U2(4)
V1(2) V2(5)
W1(3) W2(6)
L2B
L1B
L3B
E
Illustration 4.9
KM1 Main contactor
F1 Fuses (optional)
Table 4.10
4.2.3.3 Inside Delta Installation, Externally
Bypassed
Non-bypassed models have dedicated bypass terminals,
which allow the MCD 500 to continue providing protection
and monitoring functions even when bypassed via an
external bypass contactor. The bypass relay must be
connected to the bypass terminals and controlled by a
programmable output configured to Run (see parameters
4-1 through 4-9).
Electrical Installation MCD 500 Operating Instruction
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44

NOTE
The bypass terminals on MCD5-0245C are T1B, T2B, T3B.
The bypass terminals on MCD5-0360C - MCD5-1600C are
L1B, L2B, L3B.
The fuses can be installed on the input side if required.
177HA618.10
M
3
6/T3
2/T1
5/L3
3/L2
1/L1
13
14
4/T2
E
KM1
KM1
U1(1) U2(4)
V1(2) V2(5)
W1(3) W2(6)
T2B
T1B
T3B
KM2
34
33
KM2
F1
Illustration 4.10 MCD5-0245C
KM1 Main contactor
KM2 Bypass contactor (external)
F1 Semicondutcor fuses (optional)
Table 4.11
177HA502.11
M
3
6/T3
2/T1
5/L3
3/L2
1/L1
13
14
4/T2
E
KM1
KM1 F1
U1(1) U2(4)
V1(2) V2(5)
W1(3) W2(6)
L2B
L1B
L3B
KM2
34
33
KM2
Illustration 4.11 MCD5-0360C ~ MCD5-1600C
KM1 Main contactor
KM2 Bypass contactor (external)
F1 Semiconductor fuses (optional)
Table 4.12
4.3 Current Ratings
Contact your local supplier for ratings under operating
conditions not covered by these ratings charts.
All ratings are calculated at altitude of 1000 metres and
ambient temperature of 40°C.
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4.3.1 In-line Connection (Bypassed)
NOTE
Models MCD5-0021B - MCD5-0215B are internally bypassed. Models MCD5-0245C - MCD5-1600C require an external bypass
contactor.
AC-53b
3-30:330
AC-53b
4-20:340
AC-53b
4.5-30:330
MCD5-0021B 21 A 17 A 15 A
MCD5-0037B 37 A 31 A 26 A
MCD5-0043B 43 A 37 A 30 A
MCD5-0053B 53 A 46 A 37 A
AC-53b
3-30:570
AC-53b
4-20:580
AC-53b
4.5-30:570
MCD5-0068B 68 A 55 A 47 A
MCD5-0084B 84 A 69 A 58 A
MCD5-0089B 89 A 74 A 61 A
MCD5-0105B 105 A 95 A 78 A
MCD5-0131B 131 A 106 A 90 A
MCD5-0141B 141 A 121 A 97 A
MCD5-0195B 195 A 160 A 134 A
MCD5-0215B 215 A 178 A 148 A
MCD5-0245C 255 A 201 A 176 A
MCD5-0360C 360 A 310 A 263 A
MCD5-0380C 380 A 359 A 299 A
MCD5-0428C 430 A 368 A 309 A
MCD5-0595C 620 A 540 A 434 A
MCD5-0619C 650 A 561 A 455 A
MCD5-0790C 790 A 714 A 579 A
MCD5-0927C 930 A 829 A 661 A
MCD5-1200C 1200 A 1200 A 1071 A
MCD5-1410C 1410 A 1319 A 1114 A
MCD5-1600C 1600 A 1600 A 1353 A
Table 4.13
4.3.2 AC-53 Rating for Bypassed Operation
Illustration 4.12
All ratings are calculated at altitude of 1000 metres and ambient temperature of 40°C.
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4.3.3 In-line Connection (Non-bypassed/Continuous)
AC-53a
3-30:50-6
AC-53a
4-20:50-6
AC-53a
4.5-30:50-6
MCD5-0245C 245 A 195 A 171 A
MCD5-0360C 360 A 303 A 259 A
MCD5-0380C 380 A 348 A 292 A
MCD5-0428C 428 A 355 A 300 A
MCD5-0595C 595 A 515 A 419 A
MCD5-0619C 619 A 532 A 437 A
MCD5-0790C 790 A 694 A 567 A
MCD5-0927C 927 A 800 A 644 A
MCD5-1200C 1200 A 1135 A 983 A
MCD5-1410C 1410 A 1187 A 1023 A
MCD5-1600C 1600 A 1433 A 1227 A
Table 4.14
4.3.4 AC-53 Rating for Continuous Operation
Start Time (seconds)
Starts Per Hour
Illustration 4.13
All ratings are calculated at altitude of 1000 metres and ambient temperature of 40°C.
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4.3.5 Inside Delta Connection (Bypassed)
NOTE
Models MCD5-0021B ~MCD5-0215B are internally bypassed. Models MCD5-0245C ~MCD5-1600C require an external bypass
contactor.
AC-53b
3-30:330
AC-53b
4.20-:340
AC-53b
4.5-30:330
MCD5-0021B 32 A 26 A 22 A
MCD5-0037B 56 A 47 A 39 A
MCD5-0043B 65 A 56 A 45 A
MCD5-0053B 80 A 69 A 55 A
AC-53b
3-30:570
AC-53b
4-20:580
AC-53b
4.5-30:570
MCD5-0068B 102 A 83 A 71 A
MCD5-0084B 126 A 104 A 87 A
MCD5-0089B 134 A 112 A 92 A
MCD5-0105B 158 A 143 A 117 A
MCD5-0131B 197 A 159 A 136 A
MCD5-0141B 212 A 181 A 146 A
MCD5-0195B 293 A 241 A 201 A
MCD5-0215B 323 A 268 A 223 A
MCD5-0245C 383 A 302 A 264 A
MCD5-0360C 540 A 465 A 395 A
MCD5-0380C 570 A 539 A 449 A
MCD5-0428C 645 A 552 A 463 A
MCD5-0595C 930 A 810 A 651 A
MCD5-0619C 975 A 842 A 683 A
MCD5-0790C 1185 A 1072 A 869 A
MCD5-0927C 1395 A 1244 A 992 A
MCD5-1200C 1800 A 1800 A 1607 A
MCD5-1410C 2115 A 1979 A 1671 A
MCD5-1600C 2400 A 2400 A 2030 A
Table 4.15
4.3.6 AC-53 Rating for Bypassed Operation
Illustration 4.14
All ratings are calculated at altitude of 1000 metres and ambient temperature of 40°C.
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