LVC (VC-6Z44ED) — 6.6 kV / 400 A vacuum contactor for capacitors and motors
LVC (type VC-6Z44ED) is a three-phase vacuum contactor for 6.6 kV and 400 A for controlling inductive and capacitive loads. The device is intended for industrial installations with a large number of operations, above all 3.3–6.6 kV capacitor banks and electric motors.
- Rated voltage
- 6.6 kV
- Rated current
- 400 A (3 × 400 A)
- Breaking capacity
- 4 kA
- Control voltage
- 220 V AC; 110 V DC on request
Price, availability and lead time on request. We help with analogue selection, customs clearance and delivery.
Description
The LVC contactor is designed for industrial applications with many switching operations, and above all for switching motors and capacitor banks on and off. The manufacturer recommends it for capacitor banks with a voltage from 3.3 to 6.6 kV. The arc is extinguished in vacuum and remains under full control during capacitive switching, where conventional devices tend to restrike. Capacitive switching is hard for any device, because after switching off a charge remains on the capacitor and double voltage acts across the contacts.
Three independent vacuum poles are mounted on an insulating structure, so the insulation of the device is reinforced. The contactor has a very long service life, compact dimensions and low weight, and is simple to maintain. The arc-extinguishing medium of the vacuum poles does not need replacement, as in oil devices. The mass is 35 kg and the dimensions are 353 × 398.6 × 247 mm.
The rated voltage is 6.6 kV, the rated current 400 A (3 × 400 A), the breaking capacity 4 kA and the frequency 50–60 Hz. The control circuit is supplied from 220 V AC, and a 110 V DC version is available to order (VC-6Z44ED 6.6 kV 220V and 110V). The contactor complies with IEC 60470 for high-voltage AC contactors. The 110 V DC version is convenient where the control circuit is supplied from the substation battery.
LVC switches the steps of CIRKAP CMFC and CMAR automatic installations in 3.3–6.6 kV networks. It controls the starting of high-voltage induction motors of pumps, fans, compressors and mills, and is used for frequent operational switching in industrial switchgear. In switchgear the contactor works together with RMV current-limiting reactors. They reduce the inrush currents on capacitor energising to values permissible under IEC 60871-1 and by the breaking capacity of the device. Without a reactor the peak inrush currents of a bank may exceed what the contacts can withstand, especially when other steps operate nearby. The contactor does not break short-circuit currents above 4 kA, so the circuit is protected by a separate device.
Technical specifications
| Rated voltage | 6.6 kV |
|---|---|
| Rated current | 400 A (3 × 400 A) |
| Breaking capacity | 4 kA |
| Control voltage | 220 V AC; 110 V DC on request |
| Frequency | 50–60 Hz |
| Poles | three independent vacuum poles on an insulating frame |
| Mass | 35 kg |
| Dimensions | 353 × 398.6 × 247 mm |
| Standard | IEC 60470 |
Request a price and lead time
LVC (VC-6Z44ED) — 6.6 kV / 400 A vacuum contactor for capacitors and motors. We reply within one business day.
Or email sales@usk.ua or call 044 339-50-20.
Customs codes
| UKTZED (Ukraine) | 8535 90 00 00 |
|---|---|
| HS, 6 digits | 8535 90 |
| CN (EU) | 8535 90 00 |
| HTSUS (USA) | 8535 90 80 40 |
| China customs tariff | 8535 90 90 00 |
Codes are for reference: the final code is determined at declaration for the specific model.
Questions and answers
What voltages is the LVC contactor rated for?
The rated voltage of LVC is 6.6 kV, and the manufacturer recommends it for capacitor banks from 3.3 to 6.6 kV. The rated current is 400 A and the breaking capacity is 4 kA.
What is the control circuit voltage of the contactor?
The basic version is controlled from 220 V AC. A 110 V DC version is available to order.
What standard does LVC comply with?
The contactor complies with IEC 60470 for high-voltage AC contactors. The mass of the device is 35 kg and the dimensions are 353 × 398.6 × 247 mm.
Similar equipment from other manufacturers
