SJKCPS Control and Protective Switching device

The Control and Protective Switching Device (CPS) integrates motor control and circuit protection in one compact unit, supporting 0.4-125A adjustable overload ranges for AC380-400V/50-60Hz systems. This CPS combines electronic trip functionality with utilization categories AC-42/43/44, enabling precise motor management for pumps, fans, and compressors. With 80V control power compatibility (0.12-55kW) and modular design, the SJKCPS series simplifies installation while providing reliable short-circuit and overload protection. Ideal for industrial automation, this control and protective switching device reduces wiring complexity and enhances system safety.

product details

Type Designation

1	Control and Protection Switching Device
2	Main Frame Current Rating (45,125)
3	Breaking Capacity Code: C-Economic Type; Y-standard Type; H-High Type
4	Load Type (Motor M/Power Distribution P)
5	Rated Current (1A~125A)
6	Accessories (02,06, 09)(unmarked if not present)
7	Coil Control Voltage (M:AC230V; Q:AC400V)
8	Basic Type (unmarked); F-Fire Protection Type (alarm only,no tripping)
9	G- Isolated Type (unmarked if not present)

product Display

Technical Parameters

Frame Current IthA	Main Rated Current InA	Overload Electronic Trip Rated Current Ie (A)	Overload Electronic Trip Current Adjustment Range	80V Control Power Range (kW)	Utilization Category	Rated Voltage (V)	Rated Frequency (Hz)

45	SJKCPS-16	1	0.4~1	0.12~0.33	AC-42 AC-43 AC-44	380(400)	50(60)
		3	1.2~3	0.5~1.5
		6	2.4~6	1.5~3
		10	4~10	2.5~5
		16	6.4~16	4.5~7.5
	SJKCPS-32	25	10~25	5.5~11
	SJKCPS-32	32	13~32	11~15
	SJKCPS-45	45	18~45	15~22
125	SJKCPS-63	63	25~63	18.5~30
	SJKCPS-80	80	32~80	30~37
	SJKCPS-100	100	40~100	37~45
	SJKCPS-125	125	50~125	40~55

Motor Protection Curve & Power Distribution Protection Curve

◇ Motor Protection Curve

◇ Power Distribution Protection Curve

Product Utilization Categories and Typical Applications

Circuit	Utilization Category	Typical Applications

Main Circuit	AC-20A	Connecting and disconnecting circuits without conditions
	AC-40	Power distribution circuits, including mixed resistive and inductive loads with reactors
	AC-41	Non-inductive or slightly inductive loads, resistance furnaces
	AC-42	Slip-ring motors: starting, breaking
	AC-43	Squirrel-cage induction motors: starting, breaking during operation
	AC-44	Squirrel-cage induction motors: starting, plugging/reversing, jogging
	AC-45a	Switching discharge lamps
	AC-45b	Switching incandescent lamps

Circuit	Utilization Category	Typical Applications
Auxiliary Circuit	AC-15	Controlling AC electromagnetic loads
	AC-20A	Connecting and disconnecting circuits without conditions
	AC-21A	Switching resistive loads, including appropriate overloads
	DC-13	Controlling DC electromagnetic loads
	DC-20A	Connecting and disconnecting circuits without conditions
	DC-21A	Switching resistive loads, including appropriate overloads

Basic Model Operation Panel Diagram and Installation Dimensions

1.Control (Automatic or Manual) Position:

In this state, the internal control coil contact of the SJKCPS switchgear is in the closed position, controlling the circuit connection and disconnection through the coil control circuit. This state allows for remote automatic control.

2.Free Release Position:

The position where both main contacts and electromagnetic coil control contacts are disconnected when corresponding functional modules operate due to faults such as overload, short circuit, phase loss, overunder voltage in a closed circuit.

3.Disconnection Position:

The coil contact is in the disconnected position, and the SJKCPS main contact is also in the disconnected position.

4.Re-engagement Position:

The SJKCPS switchgear can only be freely released when the operating knob is turned to this position, allowing for normal resetting and re-engagement.