Chint KYN28A-24(Z) 24kV Medium Voltage Metal-Clad Switchgear Cubicle
PRODUCT SPECIFICATION · CHINT KYN28A-24 MEDIUM VOLTAGE CUBICLE

Chint KYN28A-24(Z) 24kV Metal-Clad MV Switchgear Cubicle.

PT. Prastiwahyu Tunas Engineering manufactures and integrates Chint KYN28A-24(Z) 24kV metal-clad indoor air-insulated medium voltage switchgear. Engineered for PLN primary intake substations, heavy industrial plants, and utility power distribution, the KYN28A-24 features compartmentalized metallic partitioning, withdrawable vacuum circuit breakers (VCB), comprehensive five-prevention safety interlocks, and full IEC 62271-200 compliance.

Request Proposal
Request Proposal
All Switchboards
All Switchboards
TECHNICAL BLUEPRINT & CAD ARCHITECTURE

Chint KYN28A-24(Z) Engineering Architecture & Compartmental Blueprint.

CHINT MV SWITCHGEAR KYN28A-24(Z) · DWG NO: PW-CAD-CH-240
IEC 62271-200 · IP4X / IP2X · 24kV CUBICLE
Chint KYN28A-24(Z) Medium Voltage Switchgear Blueprint CAD Diagram
24kV MEDIUM VOLTAGE CUBICLE · 800W × 2200H × 1500D mm · METAL-CLAD ✓ JABABEKA IN-HOUSE INTEGRATION
A.3 - A.5 · VCB COMPARTMENT

Circuit Breaker Bay with Withdrawable VCB

Truck-mounted Vacuum Circuit Breaker with high mechanical endurance. Automatic grounded metallic shutters isolate the primary busbars when the breaker truck is racked out to test/disconnect position.

A.1 - A.2 · RELAY & METERING

Low Voltage Instrument & Protection Bay

Isolated top compartment completely separated from MV zones, housing microcomputer protection relays, revenue power meters, trip circuit supervision, and SCADA communication interfaces.

A.6 - A.7 · CABLE & EARTHING

Cable Termination & Fast Earthing Switch

Spacious termination chamber accommodating multiple 24kV XLPE single/three-core power cables, ring CTs, VTs, surge arresters, and a fault-making rated high-speed earthing switch.

A.8 - A.9 · BUSBAR & FRAME

Busbar Chamber & Pressure Relief Channels

Electrolytic copper busbars insulated with heat-shrinkable sleeves, supported by cycloaliphatic epoxy resin insulators. Independent top pressure relief flaps vent internal arc gases safely upwards.

TECHNICAL PARAMETERS & CERTIFICATION

Chint KYN28A-24(Z) Rating Parameters.

Standard Compliance
IEC 62271-200, IEC 62271-1, IEC 62271-100, SPLN D3.014-1, PUIL 2020
Rated Voltage (Ur)
24 kV AC (Three-Phase, 50 Hz)
Power Frequency Withstand (1 min)
50 kV (to earth & between phases) / 65 kV (across isolating distance)
Lightning Impulse Withstand (Up)
125 kV Peak (to earth) / 145 kV Peak (across isolating gap)
Rated Normal Current (Ir)
630 A, 1250 A, 1600 A, 2000 A, 2500 A, 3150 A
Rated Short-Time Withstand (Ik / tk)
25 kA / 31.5 kA for 4 seconds / Peak Withstand (Ip) up to 80 kA
Loss of Service Continuity & Partition
LSC 2B / Partition Class PM (Continuous Metallic Partitions & Shutters)
Internal Arc Classification (IAC)
IAC AFLR 25 kA 1s / 31.5 kA 1s (Full 4-side Accessibility Protection)
Degree of Protection & Enclosure
IP4X (enclosure) / IP2X (between compartments) · 2.0mm Aluzinc sheet
Vacuum Circuit Breaker (VCB)
Chint NV1-24 / VD4 Withdrawable Vacuum Circuit Breaker with interlock
PROVEN DEPLOYMENT SECTORS

Medium Voltage Deployments for Chint KYN28A-24.

PLN & INDUSTRIAL POWER INTAKE

Industrial Park 20kV–24kV Substations

Main incoming, metering, and feeder cubicles interfacing PLN medium-voltage grids with industrial customer plant networks with five-prevention interlocking.

RENEWABLE ENERGY & SOLAR PV

Utility-Scale PV Step-Up Substations

Step-up transformer connection cubicles for ground-mounted and industrial rooftop solar plants with rapid vacuum circuit breaker fault clearing.

HEAVY MANUFACTURING & SMELTING

Primary Furnace & Mill Feeder Substations

Air-insulated metal-clad switchgear designed for high switching cycles feeding large oil-immersed power transformers and high-voltage motor starters.

COMMERCIAL CAMPUSES & HOSPITALS

Mission-Critical 20kV Distribution Hubs

Compact footprint metal-clad switchgear providing dual-feeder automatic transfer switching (ATS) between primary grid lines and standby generator banks.