Parker AC20 Series - Resistor Protection Devices

DOC-0017-04-EN: AC20 Series - Hardware Installation Manual
64 (154) DOC-0017-04-EN-A 22.03.2023
Parker recommends the use of cubicle mount metal clad resistors and offer an optimised range, specified
below:
Order Code
Power Rating
(W)
Resistance
(Ω)
Continuous Current
Rating (A)
CZ467715
60
500
0.3
CZ467714
100
200
0.7
CZ389853
100
100
1.0
CZ467717
200
100
1.4
CZ388397
200
56
1.9
CZ463068
200
56
1.9
CZ467716
500
56
3.0
CZ388396
500
36
3.7
It is recommended that a large safety margin be incorporated to ensure that the resistors are not
overloaded.
Resistor Protection Devices
Where a Dynamic Brake Resistor is used, Parker recommends the addition of a thermal overload switch
(motor starter) or fuse (of aM type or equivalent), to be fitted in series with the resistor. This is to provide
protection to the component:
Thermal Overload Switch
Fuse
It is recommended the thermal overload switch / fuse is sized with a 10% margin greater than the
theoretical continuous current.
Where a fuse is used, consideration must also be taken to ensure that the peak current in the resistor is
less than 6.3x the nominal fuse rating.
Users should also be aware of the instantaneous power in the resistor.
Note: The values mentioned above are general guidelines. The user should check the I*t curves in
the component datasheet when sizing the correct protection device for the application.
Dynamic
Braking
Resistor
Thermal
Overload Switch
Dynamic
Braking
Resistor
Fuse