4.3.3.3 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 an external bypass contactor. Connect the bypass
contactor to the bypass terminals and control the
contactor by a programmable output configured to
Run
(see
parameters 4-1 to 4-9
).
NOTICE
The bypass terminals on MCD5-0245C are:
•
T1B
•
T2B
•
T3B
The bypass terminals on MCD5-0360C to MCD5-1600C
are:
•
L1B
•
L2B
•
L3B
If necessary, the fuses can be installed on the input side.
177HA618.11
M
3
6/T
2/T
5/L3
3/L2
1/L1
13
14
4/T
E
K1
K1
U1(1) U2(4)
V1(2)
V2(5)
W1(3)
W2(6)
T2B
T1B
T3B
K2
34
33
K2
F1
K1
Main contactor
K2
Bypass contactor (external)
F1
Semiconductor fuses (optional)
Illustration 4.12 Inside Delta Installation, Externally Bypassed,
MCD5-0245C
177HA502.12
M
3
6/T
2/T
5/L3
3/L2
1/L1
13
14
4/T
E
K1
K1
F1
U1(1) U2(4)
V1(2)
V2(5)
W1(3)
W2(6)
L2B
L1B
L3B
K2
34
33
K2
K1
Main contactor
K2
Bypass contactor (external)
F1
Semiconductor fuses (optional)
Illustration 4.13 Inside Delta Installation, Externally Bypassed,
MCD5-0360C to MCD5-1600C
4.4 Current Ratings
Contact the local supplier for ratings under operating
conditions not covered by these ratings charts.
All ratings are calculated at an altitude of 1000 m (3281 ft)
and ambient temperature of 40
°
C (104
°
F).
Electrical Installation
Operating Guide
MG17K602
Danfoss A/S © 05/2016 All rights reserved.
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