Air-insulated metal composite withdrawable switchgear (ZS1)

Product DescriptionMedium Voltage arc Proof Air Insulated Metal Clad 24KV Switchgear Medium voltage switchgearUniGear ZS1 is medium voltage switchgear with a metal enclosure, suitable for indoor installations. Metal clad and seperate the compartments from each other\'s. Their live parts are air-insulated. Since the swi

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Product Description
Medium Voltage arc Proof Air Insulated Metal Clad 24KV Switchgear
Medium voltage switchgear

UniGear ZS1 is medium voltage switchgear with a metal enclosure, suitable for indoor installations. Metal clad and seperate the compartments from each other's. Their live parts are air-insulated. Since the switchgear is highly modular type, this make simple selection of components required by any application. The functional units of the switchgear are guaranteed arc proof in accordance with the IEC 62271-200 Standards. All the installation, operation and maintenance operations can be carried out from the front of the switchgear. The vacuum circuit breaker and earthing switches are operated from the front with the door closed. The switchgear can be back to wall installed.

iUnigear Air Insulated Switchgear
Air Insulated Metal Clad Drawable Switchgear (ZS1)

Protection Components

The range of apparatus available for UniGear ZS1 switchgear is the most complete on the market, including:
  • Withdrawable vacuum or gas VCB
  • withdrawable vacuum contactor
This makes it possible to offer a single switchgear-user interface, with the same operational and maintenance procedures.
The switchgear can be fitted with instrument transformers or sensors for current and voltage measurement and protection and any brand circuit breakers or relay protection.

Switchgear, busbar configuration

In the completion of the traditional functional units in single busbar arrangement, the UniGear ZS1 switchgear platform is fitted with:
  • Double busbar
  • Compact units equipped with vacuum contactors & fuses,
  • Double Busbar Systems.
Working conditions
Ambient conditions:
  • 5 °C to + 40 °C
For different temperature ranges, Unisun provide heater or cooling fan with temperature monitor as solution
  • Ambient humidity:
  • up to 95% RH average in 24h
  • up to 90% RH average in monthly
  • water vapour pressure up to 2.2 kPa in 24h
  • water vapour pressure up to 1.8 kPa monthly
  • The normal working altitude is up to 2,000 m above sea level. For higher altitude applications, please consult upon ordering
  • Install in normal, non-corrosive and uncontaminated environment

Unisun ZS1 switchgear and main components comply with the following Standards:
  1. IEC 62271-1 for general purposes.
  2. IEC 62271-200 for the switchgear.
  3. IEC 62271-102 for the earthing switch.
  4. IEC 62271-100 for the circuit-breakers.
  5. IEC 60071-2 for the insulation coordination.
  6. IEC 62271-106 for the contactors.
  7. IEC 60265-1 for the switch-disconnectors.
  8. IEC 60529 for degree of protections.
Colour of the external surfaces
RAL7035 - ligh grey (front doors and side cover). Other colours are available on request.

Degrees of protection
The degrees of protection of the switchgear conform with IEC 60529 Standards.
UniGear ZS1 switchgear is normally supplied with the following standard degrees of protection:
IP4X for the enclosure.
IP2X for the partition between compartments.
higher degree of protection could be customized pls contact Unisun technical dept.

Electrical Parameter
Rated voltagekV7.21217.524
Rated insulation voltagekV7.21217.524
Rated power frequency withstand voltagekV 1min20283850
Rated lightning impulse withstand voltagekV607595125
Rated frequencyHz50/6050/6050/6050/60
Rated short time withstand currentkA 3  s…50…50…50…31.5
Peak currentkA…125…125…125…80
Internal arc withstand currentkA 1 s…50…50…50…31.5
Main busbar rated currentA…4,000…4,000…4,000…3,150
Circuit-breaker rated currentA630630630630
Air Insulated Metal Clad Drawable Switchgear (ZS1)

1.The payment term: We accept TT,30% deposit and 70% balance against copy of BL.
2.The delivery time: Usually it will take about 15-20 days.
3.The standard of package: Usually use strong plywood case for protection.
4.The material of transformer: We have two types, one is with copper and another one is with aluminum. It depends on your requirement. In fact, those two have difference if normal work well. Only except the long life. Copper is better and also higher price.
5.The logo: If you have good quantity, it absolute no problem to do OEM.
6.Our market: our products are popular in Indonesia, Philippines, Russia, USA, Middle East and so on. Some of them are our regular customers and some of them are developing. We hope you can join us and make mutual benefit from our cooperation..
7.Warranty: in 12 month since BL date.


1.quick response in before sales period help you got order.
2.excellent service in production time let you know each step we made.
3.reliable quality solve you after sale headache.
4.long period quality warranty ensure you can buy without hesitate.


1. One-stop supplier globally.
2. More than 10 years professional experiences in electrical appliance industry. 
3.We offer professional online technology support for perfecting your electrical solution free.
4. Experienced sales service and suggestion.
5. All the products with accessories under strict quality control and final inspection before shipping.
6. We can assure the powerful competitive price and reliable quality products.
7. Most competitive shipping rate from our own shipping forwarder.
8. Warranty assurance: 12 month
9. Whatever big or small order, we can provide you one-to-one service.  


Contact person: Mr. Chen Chengming
 Air Insulated Metal Clad Drawable Switchgear (ZS1)

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Air Insulated Metal Clad Drawable Switchgear (ZS1)

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