KYN28-12 switchgear
KYN28-12 is a standardized indoor, metal-clad, withdrawable medium-voltage switchgear design (compliant with IEC 62271-200).
The specific models of components can vary by manufacturer, but their functional roles are consistent.
KYN28-12 indoor armored metal-enclosed switch equipment is suitable for three-phase AC 50HZ, 7.2~17.5kV single busbar and single busbar sectionalized power system, with perfect "five-proof" function.
The removable part of the switchgear cabinet can be equipped with extractable vacuum circuit breaker or vacuum contactor, isolation trolley, PT trolley and other components.
Summary Table of Key Components of KYN28-12 switchgear
Choose the plan that suits you best.
|
Component Name |
Vacuum Circuit Breaker
Current Transformer
Voltage Transformer
Earthing Switch
High-Voltage Fuse
Surge Arrester / Overvoltage Protector
High-Voltage Indicating Device
|
Common Model Series |
VS1 (Generic China),
VD4 (ABB),
VB2 (Siemens),
EV12 (Schneider)
LZZBJ9-10
AS12 (ABB)
LMZ (Busbar Type)
JDZ(J)10,
JDZX10
(with residual winding)
JN15
(Most common manual type)
XRNP-12 (for PT protection),
XRNT-12 (for transformer protection)
HY5WZ-17/45 (Zinc Oxide Arrester),
TBP (Combined Overvoltage Protector)
GSN, DXN series (suffix 'Q' indicates with interlock)
|
Primary Function |
Control & Protection Core: Makes/breaks the circuit under normal conditions; trips automatically during faults (overcurrent, short-circuit).
Current Transformation & Measurement: Steps down primary current (e.g., 1000A) to a standard secondary value (5A or 1A) for meters and protection devices.
Voltage Transformation & Measurement:
Steps down primary voltage (10kV) to a standard secondary voltage (100V) for metering, measurement, and protection relays.
Safety Grounding: Provides a visible earth connection for the main circuit during maintenance to ensure personnel safety.
Short-Circuit Backup Protection:
Protects Voltage Transformers or auxiliary transformers by rapidly melting during internal faults.
Overvoltage Protection:
Limits transient overvoltages (lightning, switching) to protect insulation.
Status Indication & Safety Interlock: Visually indicates live circuit status (LEDs/neon lamps). Provides contacts for interlocking the earthing switch.
|
Typical Location in Cabinet |
Mounted on a withdrawable truck.
Positions: "Service", "Test", "Disconnected"
Fixed installation
in the cable compartment or rear wall.
The main conductor passes through its center.
Mounted on a dedicated PT truck or fixed in the cable/busbar compartment.
Fixed in the cable compartment, connected to the cable termination. Mechanically interlocked with the circuit breaker.
Series-connected with the PT, either on the PT truck or in a fixed compartment.
Installed in the busbar or cable compartment, connected between phase and earth.
Display unit on the front door; sensors on cables or busbars.
Picture show of KYN28-12 switchgear
Company Introduction
Founded in 2014, Shaanxi West Power Tongzhong Electrical Co., Ltd. is a leading innovator in the electrical industry with over 20 years of industry experience.
Our address
No. 1 East Gaoxin Avenue in the High-Tech Development Zone of Baoji City, Shaanxi Province, China
Phone Number
+86 180 9176 5658
xdtz03@westpowerelectric.com
