33 KV (30KV - 40.5KV) THREE PHASE AUTOMATIC CIRCUIT RECLOSERS
Product Description
33KV three phase class III recloser is in accordance with ANSI/IEEE C37.60.
The recloser is designed to provide self-contained 33KV circuit protection with series trip, solenoid operation and electronic control single break contact structure and fault interruption under vacuum.
The vacuum interrupters are in accordance with ANSI/IEEE C37.85.
The recloser is designed to sense line-to-ground, line-to-line or three-phase fault currents and interrupt all three phases of the distribution circuit simultaneously.
Equipped with an electronic type ground feature. For fault target, the Automatic Circuit recloser will be provided with an indicator for detection of fault current on individual phase or ground.
If the Electronic Control cubicle of Reclosers or Recloser itself require an auxiliary transformer, the manufacturer will provide the same. The recloser is provided with an in-built auxiliary transformer of required rating to provide power supply to the control panel.
1. Main Parameters
Rated voltage, kV
33, 35, 36
Max. working voltage, kV
40.5
Rated current
630A, 1250A
Rated breaking current, not less than, kA
20
Electrical dynamic withstand current, kA
51
Operation times
20000
Heating withstand current (during 3 seconds / this parameter must not be as 1 sec), not less than, kA
20
Open, close reserve, not less than:
- By rated current, Close-Open action
- By breaking current, Close-Open action
20000
25
Breaking own period, not more than, ms
45
Full breaking period, not more than, ms
55
Close own period, not more than, ms
60
Testing voltage of lightning impulse, kV
190
1 min testing voltage by voltage with production frequency, kV
95
Cycle of recloser
-
Max amount of close and open cycle within 1 hour, not less than
100
Ambient environmental condition performance
Dedicated to work for outdoor and cold weather
Upper limit of ambient relative moisture when air temperature is at 25°C
100%
Ambient environmental min temperature, °C (It must be approved by test)
-50
Ambient environmental max temperature, °C (It must be approved by test)
+55
Environmental condition, not less than
Above 1500 m from sea altitude
Protection degree of drive external main body
IP54
Penetration length of external insulating, mm, not less than
1700
Permissible environmental wind amount when no icing - not more than
40 m/s
Permissible environmental wind amount of wire iced period (Icing wall thickness is till 20 mm), not more than
15 m/s
Related Products
Technical & Application Overview
We are a power transmission and distribution enterprise with R&D, manufacturing, trading and services. Specialized in Electric Power Fittings, especially on aerial overhead line fitting and ABC accessories, Polymer Insulators, Lightning Arrester, Drop-out Fuse Cutout, Disconnect Switch, Auto-Recloser, SF6 Gas Circuit Breaker, and other key power transmission and distribution products.
With excellent quality, design, and manufacturing combined with competitive parameters, these products are top sellers and have been exported to Asia, Europe, America, Middle-East, Africa, and numerous other regions worldwide. We contribute to building better and stronger power systems everywhere.
Frequently Asked Questions (FAQ)
Q What standards does this 33KV three-phase automatic circuit recloser comply with?
The 33KV three-phase class III recloser conforms fully to ANSI/IEEE C37.60 standards. Additionally, the vacuum interrupters utilized are designed and built in accordance with ANSI/IEEE C37.85 standards.
Q What types of faults is the recloser designed to sense and interrupt?
The unit is specifically engineered to sense line-to-ground, line-to-line, or three-phase fault currents. Once detected, it interrupts all three phases of the distribution circuit simultaneously to ensure maximum system protection.
Q What are the working voltage limits and rated currents of the recloser?
The system has a rated voltage capability of 33kV, 35kV, or 36kV, with a maximum working voltage threshold of 40.5kV. It is available in rated current options of either 630A or 1250A.
Q Under what temperature ranges can this equipment safely operate?
It is fully approved via testing for operation in extreme environmental conditions, ranging from a minimum ambient temperature of -50°C to a maximum ambient temperature of +55°C.
Q What mechanical longevity and protection ratings does the unit offer?
The recloser has a high operational durability, supporting at least 20,000 operation cycles. The protection degree of its external main drive body is rated at IP54.
Q How does the system handle high wind and icing conditions?
It is designed to withstand a maximum permissible environmental wind speed of up to 40 m/s when there is no icing, and up to 15 m/s during wire-iced periods (with icing wall thickness up to 20 mm).
UniWave Electric
