UCWT UHD / HD / ND, UCW, MCW capacitors for reactive power compensation 208–690 V
Country: Brazil · Model: UCWT UHD / HD / ND, UCW, MCW
Power capacitors for reactive power compensation in low-voltage networks of 208–690 V, made to IEC 60831-1/2 and UL 810. The line covers three-phase UCWT for 0.5–50 kvar, single-phase UCW for 0.6–10 kvar and MCW assembled modules. The operating duty determines the UHD, HD or ND version.
- UCWT UHD (three-phase)
- 3.0–25 kvar, 220–535 V, life 300 000 h, up to +70 °C
- UCWT HD (three-phase)
- 0.5–50 kvar, 208–690 V, life 150 000 h
- UCWT ND (three-phase)
- 4.5–30 kvar, 220–480 V, life 100 000 h
- UCW (single-phase)
- 0.6–10 kvar, 208–535 V, life 100 000 h
Technical specifications
| UCWT UHD (three-phase) | 3.0–25 kvar, 220–535 V, life 300 000 h, up to +70 °C |
|---|---|
| UCWT HD (three-phase) | 0.5–50 kvar, 208–690 V, life 150 000 h |
| UCWT ND (three-phase) | 4.5–30 kvar, 220–480 V, life 100 000 h |
| UCW (single-phase) | 0.6–10 kvar, 208–535 V, life 100 000 h |
| Inrush current | UHD — 400 × In; HD — 300 × In; ND, UCW, MCW — 100 × In |
| Continuous current | UHD — 2.5 × In; HD — 1.5 × In; ND, UCW, MCW — 1.3 × In |
| Capacitance tolerance | ±5 % |
| Short-circuit withstand limit | 10 kA |
| Temperature class | −25/D |
| Standards | IEC 60831-1/2, UL 810, RoHS |
| Warranty | UHD — 5 years; HD — 3 years; UCW — 1 year |
Specifications are taken from the manufacturer’s technical documentation. Updated .
Description
All capacitors are built on self-healing metallized polypropylene film. When the dielectric breaks down, the metal around the breakdown point evaporates, the short circuit is isolated, and the capacitance decreases almost imperceptibly. Each element has internal overpressure protection that disconnects it at the end of its service life or in case of a fault. The cases are made of aluminium alloy, there are no PCBs, and the three-level protection is complemented by a biodegradable elastic resin. UHD (ultra heavy duty) is designed for severe conditions and combined harmonic filters, 3.0–25 kvar at 220–535 V, life 300 000 h, up to +70 °C. HD covers 0.5–50 kvar at 208–690 V with a life of 150 000 h, and ND 4.5–30 kvar at 220–480 V with a life of 100 000 h. For UHD and HD, wave cutting of the film, gradient metallization and semi-dry resin are used. MCW modules are made of UCW capacitors in a three-phase block; the BI-MCW jumper connects in parallel up to three modules at a voltage up to 240 V or up to four at 380 V and above. The capacitance tolerance is ±5 %, the permissible voltage is 1.1 of rated for up to 8 h per day, the frequency is 50 or 60 Hz, the fixing is by an M12 screw, the altitude is up to 2000 m and the humidity up to 95 %. Three-phase elements are delta-connected.
How to choose
The network duty determines the version. Where harmonics and detuning reactors are present, take UHD with a continuous current of 2.5 of rated and an inrush of 400 of rated. For ordinary loads ND at 1.3 of rated is enough, and HD is an intermediate option with 1.5 of rated. For ready-made banks and automatic power factor correction units look at BCW, BCWP and BCWA.
Request a price and lead time
UCWT UHD / HD / ND, UCW, MCW capacitors for reactive power compensation 208–690 V. We reply within one business day.
Or email office@usk.ua or call +38 (044) 339-50-20.
FAQ
How do UHD, HD and ND capacitors differ?
They differ in permissible current and life. UHD withstands 2.5 of rated current and an inrush of 400 of rated, HD withstands 1.5 and 300, ND withstands 1.3 and 100.
What are the life and warranty of UCWT UHD?
The life is 300 000 h, the warranty is 5 years, and the maximum temperature is +70 °C.
How many MCW modules can be connected in parallel?
With the BI-MCW jumper, up to three modules can be combined at a voltage up to 240 V or up to four at 380 V and above.
What happens when the dielectric breaks down?
The metallization around the breakdown evaporates, the short circuit is isolated, and the capacitor continues to work with almost unchanged capacitance.
Are the capacitors suitable for networks with harmonics?
UHD is intended for severe conditions and combined harmonic filters, and its continuous current is 2.5 of rated.
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