Prefabricated single-sided service chambers of the CSR 202V, 202 VM series

• compactness (front width 750 mm, depth 1100 mm);

• division of the chamber into compartments: high-voltage, relay, cable;
• various interlocks to protect against faulty actions during maintenance and repair;
• convenience and ease in operation and maintenance;
• a full set of main circuit and secondary wiring circuit diagrams that meet the customer's requirements;
• use, at the Customer's request, of switching devices and relay protection and automation devices (including microprocessor-based ones) from Russian or foreign manufacturers;
• replacement and connection without additional adaptation with CSR chambers of the series: 2УМ, 272, 285, 292, 298, 2000, etc;
• application of modern technologies in manufacturing (cutting, bending and perforation of metal on automated FINN-POWER complexes, powder coating).

 

Parameter name	Value
	CSR-202V	CSR-202VM
Rated voltage (linear), kV	6; 10
Rated operating voltage (linear), kV	7,2; 12
Rated current of main circuits, A	630; 1000; 1600	630; 1000
Rated breaking current, kA	12,5; 20
Thermal resistance current (three-second current), kA	20
Electrodynamic resistance current, kA	51
Rated current of current transformers, A	50; 75; 100; 150; 200; 300; 400; 600; 800; 1000; 1500	50; 75; 100; 150; 200; 300; 400; 600; 800; 1000
Rated current of busbars, A	630; 1000; 1600	630; 1000
Rated current of bus bridges, A	630; 1000; 1600	630; 1000
Rated power of auxiliary transformers built into the CSR cabinet, kVA	1,25; 25;40	1,25; 25;40
Rated voltage of auxiliary circuits, V: - protection, control and signaling circuits of DC and AC, V - voltage transformer circuits, V - auxiliary transformer circuits, V Lighting circuits: - inside the CSR chamber, B - CSR chamber facade, B	220 100 220; 380 12 12; 220	220 100 220; 380 12 12; 220
Power fuse current, A	3,2; 5; 8; 10; 16; 20; 31,5 ÷ 160
Note - Thermal and electrodynamic resistance of current transformers according to their technical parameters.

Nominal values of environmental climatic factors are as per GOST 15150-69 and GOST 15543.1-89.

And:

• ambient temperature - from -45 to +40⁰C, for chambers with Evolis switch - from -25 to +40⁰C;

• altitude above sea level should not exceed 1000 m;
• explosion-proof environment, free from conductive dust, aggressive vapors and gases that destroy insulation and metals (atmosphere II as per GOST 15150-69).

The chamber is a metal structure assembled from rolled sheet profiles.

Main circuit equipment is installed inside the chamber. Drive and control equipment handles are located on the front of the CSR. Protection, control and signal relay, metering and measuring instruments are located both on thew front and inside the CSR.

Access to the CSR-202V chamber is provided by two doors: the upper one - to the area of the high-voltage switch, voltage transformer or fuse, the lower one - to the area of cable connections, power transformer or disconnector. Movable partition is installed between the door with the auxiliary circuit equipment and the high-voltage switch to prevent access to the high-voltage area. The chamber has windows to view it inside.

Main busbars of the CSR chambers are equipped with cages or closed sheeting with viewing windows.

All equipment and instruments installed in the CSR chamber that are subject to grounding are grounded.

In chambers with cable entries, it is possible to terminate four three-phase cables with a cross-section of up to 240 mm2, as well as single-phase cables with plastic insulation with a cross-section of up to 500 mm2.

There is a box located in the middle part of the CSR 202V chambers and in the relay compartment for the CSR-202VM which serves as a channel for the bus cables in the operative power supply circuits of the closing solenoids, control and signalling circuits. Besides, the box contains an output terminal block for inter-chamber connections of auxiliary circuits.

To avoid faulty actions during maintenance and repair, the chambers have the following interlocks:

1. mechanical:

• interlock preventing the linear and busbar disconnectors from being switched on and off when the high-voltage circuit breaker is on;

• interlock preventing the earthing switches from being switched on when the disconnectors switches are on;
• interlock preventing disconnectors from being switched on when earthing switches are on;

2. electric:

• interlock preventing the high-voltage switch from being turned on when the disconnector is in an intermediate position

• interlock preventing the input switch and bus section switch from being turned on when the busbar earthing switches are on

For other types of interlocks (operational safety, etc.) in accordance with the auxiliary circuit diagrams, block locks and limit earthing position switches (optional) can be installed in the CSR chambers at the request of the customer.

In case of a two-row arrangement of chambers in the switchgear room busbar bridges are installed on the chambers, which are a metal structure consisting of two frames with insulators, busbars and busbar holders installed on them.