- Circuit breakers PR series are mechanical switching devices able to switch, conduct and switch-off the current under normal conditions and able to switch, conduct and automatically switch-off the current under abnormal circuit conditions such as short circuit.
- They are used to protect house installations and industrial electric distributions and devices against overcurrents.
- They are designed to be operated by untrained persons and they are maintenance-free.
- Handles of circuit breakers characteristic B, C, D are coloured like the rated currents of designation of the threaded fuse cartridges: 0,5-4 A - brown, 6-8 A - red, 16 A - gray, 20 A blue, 25 A - yellow, 32 and 35 A - violet, 40 A - black, 50 A - white, 63 A - orange, M - characteristic circuit breakers have black handles.
- There is optical state indicator on the front side of the circuit breaker indicating operation state of the device (green target visible = closed contacts, red target visible = opened contacts). The state indicator is directly connected to the device contact system and it does not depend on the handle position (circuit breaker also can switch-off when the handle is sealed - it is corresponding with safe switch-off conditions)
- MCBs are commonly delivered with identification label of grey colour RAL 7035, placed on the front side above the operating handle intended for direct description. There isa possibility to order following identification labels:
- of grey colour with text (lights, sockets, boilers, heating, main MCB, etc.)
- of blue colour
- transparent, under which there is a possibility to put paper labels with dimensions 4,3 x 9,5 mm
- lower flexible clip for fastening to the rail 35 x 7,5 in accordance with EN 60 715 - it allows also to take out circuit breaker from the line of devices together connected by lower busbar strip without interrupting of adjacent current circuits.
- upper fixed clip - it allows to take out circuit breaker from the line of devices connected together by upper busbar strip.
- with two clips for mounting on panel fixed with screws M5.
- Sealable in ON and OFF position.
- There is a possibility to use throughout covers for both terminals (the modular width 17,5 mm) which can be sealed by blinder.
- Connection:
- conductors 1 – 25 mm2
- busbar strip – top and low terminal allows connecting of pin and fork busbar strip.
- simultaneous connection of conductors and busbars
- Method of connection: for ACMCBs optional, that means that input and output terminals can be changed. , for DCMCBs, the polarity of terminals has to be observed.
