ZW32 series outdoor high-voltage vacuum circuit breakers are outdoor high-voltage distribution devices with rated voltage of 12KV-36KV and three-phase AC of 50Hz.It is mainly used for opening and closing the load current, overload current, short circuit current in power...
Product Details
PRODUCTION INTRODUCTION
Recloser principle
Reclosers are used in overhead lines and in substations. Like circuit-breakers they are capable of switching normal and fault currents. They are equipped with sensors and controller being the protection and control device. In case of a temporary line fault, they can trip and reclose up to four times, thus avoiding longer network interruptions.
Recloser cycle
In case of a network fault, the recloser opens and recloses several times. In case of temporary faults, the automatic reclosing significantly reduces the outage times. While the trip settings for each operation can be set individually.
Design of switch unit
Each vacuum interrupter is embedded in a solid-insulated pole made of weatherproof cycloaliphatic epoxy-resin. The vacuum interrupter is vertically mounted inside the pole, providing a long service life. Each pole is equipped with an integrated current transformer and a resistive voltage sensor.
Operating mechanism
The recloser is operated by a magnetic actuator#the actuator is a bi-stable system, locked in the end positions by permanent magnets.lf not in operation, the magnet coils do not consume any power.
The operating mechanism housing is made of stainless steel for outdoor applications, it also accommodates the position indicator and a mechanical operations counter.
Mechanical lockout The recloser can be tripped manually. If the handle is pulled, the recloser opens and is simultaneously locked out electrically and mechanically. The handle stays extended, thus indicating the interlocked state.
Controller description
Controller
The Microprocessor Based controller provide protection, control, monitoring, instrumentation and metering with integrated input and output logic, data logging & fault reports.
Communication access to controller functionality is via electrical RS485 port for remote connection. Additional rear port options including RS232 port is available. The controller is mounted in the control cubicle. Along with the controller, this cubicle also contains the auxiliary power supply with batteries for uninterruptible power supply, electronic boards and circuit breakers.
The controller contains a large number of protection functions (elements) which can be selected or deselected through the menu driven display.