Outdoor Sectionalizing Vacuum Load Switch FZW28-12F - Product

Overview:

The FZW28-12F outdoor sectionalizing vacuum load switch (referred to as the sectionalizing switch) is designed for installation on outdoor poles and features manual closing and electric operation functions. The switch body incorporates technology from Toshiba's VSP5-12 and is a maintenance-free load switch. It utilizes vacuum for arc extinguishing and SF6 gas as the insulating medium for both phase-to-phase and phase-to-ground insulation.

The FZW28-12F outdoor sectionalizing vacuum load switch is equipped with fault detection, protection control, and communication functions. It is installed on 10kV overhead lines and can automatically clear single-phase ground faults and isolate phase-to-phase short circuit faults. The installation point is suitable for the responsibility boundary point of user incoming lines on 10kV distribution lines, and it can also be used at branch line connections that meet the requirements.

Normal Operating Conditions:

Ambient air temperature: upper limit not exceeding 40°C, lower limit not exceeding -45°C;
Wind speed not exceeding 35 m/s;
Altitude not exceeding 1000 meters, with seismic intensity not exceeding 8 degrees;
Environmental humidity: monthly average relative humidity not exceeding 90%; daily average relative humidity not exceeding 95%;
Ice cover thickness not exceeding 10mm;
Installation sites should be free from flammable, explosive, chemically corrosive substances, and frequent severe vibrations;
Neutral grounding methods: ungrounded neutral, neutral grounded through an arc suppression coil, or neutral grounded through a small resistor.

Item	Unit	Parameter
Operating Method		Manual or Automatic (Electromagnetic)
Rated Voltage	kV	12
Rated Current	A	630
Rated Short-Time Withstand Current (4s)	kA	12.5, 16, 20
Rated Short-Circuit Making Current (Peak)	kA	31.5, 40, 50
Rated Frequency	Hz	50
Operating Voltage		AC220V (80%-110%)
Power Frequency Withstand Voltage (1 min)
Phase-to-Ground	kV	42
Phase-to-Phase	kV	42
Across Open Contacts	kV	48
Secondary to Ground	kV	2
Impulse Withstand Voltage (Peak)
Phase-to-Ground	kV	75
Phase-to-Phase	kV	75
Across Open Contacts	kV	84
Net Weight	kg	185
Rated Pressure of SF6 Gas		Gauge pressure with concentration above 93%
Operating Handle Force	N	100-400
Main Circuit Resistance	μΩ	≤500
Closing Operation
Operating Voltage	V	184-220
Closing Time	ms	120-180 (220V) / Bounce Time ≤10ms
Closing Current (Peak)	A	≤17
Holding Current	A	≤0.45
Minimum Closing Voltage	V	120-160
Opening Operation
Operating Voltage	V	184-220
Opening Time	s	≤1.5
Non-Simultaneity Time	ms	≤30
Minimum Holding/Closing Voltage	V	65-85
Isolation Distance and Vacuum Interrupter Contact Travel Difference	ms	10±2
Airtightness Test (Leak Test)		0.2 MPa Gauge Pressure, No Leakage
Vacuum Interrupter Contact Opening Distance	mm	7-9
Vacuum Interrupter Contact Overtravel	mm	3-3.5
Isolation Distance Opening	mm	25-30
Isolation Distance Overtravel	mm	6-13