HL32-100 Isolation Switch

HL32 series small disconnecting switch is suitable for ac 50Hz, rated working voltage 230V/400V and below, rated current up to 100A line, under load can be connected and disconnected circuit.

The number of 1 p, 2 p, 3 p, 4 p

Rated voltage 230V/400V

Rated current 3263100A

Rated frequency 50/60Hz

Rated short-time withstand current 12LE, power-on time 1s

Rated short circuit connecting capacity 20le, power time 0.1s

Rated switching and breaking capacity 3le, 1.05UE, COS φ =0.65

Operating performance: no load 8500 times, loaded 1500 times

Applicable standard IEC60947-3, GB14048.3

1) After opening, a reliable insulation gap is established to separate the equipment or line to be repaired from the power supply with an obvious disconnect point, so as to ensure the safety of maintenance personnel and equipment.

2) According to the operation needs, change the connection line.

3) Can be used to divide and close the small current in the line, such as bushing, bus, connection head, short cable charging current, capacitor current of switching voltage equalizing capacitor, the circulation of double bus changing and the excitation current of voltage transformer, etc.

4) According to the specific situation of different structure types, it can be used to divide or close the no-load excitation current of a certain capacity transformer.

High voltage disconnecting switch can be divided into outdoor high voltage disconnecting switch and indoor high voltage disconnecting switch according to the different installation modes.  Outdoor high pressure isolation switch refers to withstand wind, rain, snow, pollution, condensation, ice and frost, etc., suitable for the installation of high pressure isolation switch used in the terrace.  According to the different insulation pillar structure can be divided into single-columnDisconnector (single-columnDisconnector), double-columndisconnector (double-columnDisconnector), three-columndisconnector (three-columnDisconnector).  The single column disconnecting switch directly uses the vertical space as the electrical insulation of the fracture under the overhead bus. Therefore, it has the obvious advantages of saving the floor area, reducing the lead wire, and at the same time, the opening and closing state is particularly clear.  In the case of ultrahigh voltage transmission, the area saving effect is more remarkable after the single column disconnecting switch is adopted.

Disconnecting switch in low-voltage equipment is mainly applicable to residential, building and other low-voltage terminal distribution system.  Main function: load breaking and connecting lines.

1. Used to isolate the power supply, disconnect the high-voltage maintenance equipment from the live equipment, so that there is an obvious visible disconnect point.

2. The disconnecting switch is coordinated with the circuit breaker to switch according to the needs of the system operation mode to change the system operation wiring mode.

3. Used to close or disconnect small current circuits.

Generally, a group of disconnecting switches are installed on the two sides of the circuit breaker before and after, the purpose is to isolate the circuit breaker from the power supply, forming an obvious disconnect point;  Because the original circuit breaker is the oil circuit breaker, the oil circuit breaker needs frequent maintenance, so the two sides will have obvious disconnect point, in order to facilitate maintenance;  Under normal circumstances, the outlet tank from the bus through the switch cabinet power down, needs a set of isolating switch in front of the circuit breaker is isolated from the power, but sometimes, the back of the circuit breaker may also have chemistry, such as through other loop of send, capacitor devices such as the send, so it need a group of isolating switch at the back of the circuit breaker.

The disconnecting switch is mainly used to reliably isolate the power-off part of the high-voltage distribution device from the live part to ensure the safety of the maintenance work.  Isolating switch contact all exposed in the air, has obvious disconnect point, isolating switch no arcing devices, therefore cannot be used to cut off the load current or short circuit current, otherwise under the effect of high pressure, the disconnect will produce strong arc, and it is hard to out of its own, and may even cause arcing (relative or interphase short circuit), burning equipment, endanger personal safety,  This is the so-called “load pull disconnecting switch” serious accident.  Disconnecting switches can also be used to perform certain circuit switching operations to change the way the system operates.  For example, in a double-bus circuit, a disconnecting switch can be used to switch a running circuit from one bus to another.  At the same time, it can also be used to operate some small current circuits.