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Optional Fittings
162
9. Optional Fittings
The user can order and we will provide on demand any of the following fittings:
9.1 Braking Units
The braking unit and the braking resistor are combined to absorb the electrical energy regenerated by
the braking of the motor. This combination can be used both for Senlan® inverters and other inverters.
Inverters with inbuilt braking units only need to be fitted with a proper braking resistor, while those
without an inbuilt braking unit must be fitted with an appropriate external braking unit and a braking
resistor.
Wiring Diagram of the Braking Unit, Braking Resistor and Inverter:
DB
P+
P+
N-
PE
DC+
DC-
SZ20G
TA
TB
TC
P+
N-
Braking unit
Braking resistor
Ground
Normal
Fault
Inverter
The length of the connection line between the braking unit and the inverter, or between the braking unit
and the braking resistor, must be within 5m, and it is necessary to ensure the enclosed area of the loop
is the smallest.
Refer to the following table for the specification of Senlan® SZ braking unit series:
Braking Unit
Model Number
Resistance
(
Ω
)
Appropriate
Inverter
(kW)
Braking
Voltage
(V)
SZ20G-30
≥
22 18.5/22 680
SZ20G-60
≥
11 30/37 680
SZ20G-85
≥
8 45/55 680
SZ20G-130
≥
5 75/90 680
SZ20G-170
≥
4 110 680
SZ20G-260
≥
2.6 132/160 680
SZ20G-380
≥
1.8 200/250
680
Summary of Contents for SB200 Series
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