B15 / B35 / B50 / DMP-FTV / GE 230V — automatic 0.4 kV reactive power compensation units without reactors

Country: Italy · Model: B15 / B35 / B50 / DMP-FTV / GE 230V

B15, B35, B50, DMP-FTV and GE 230V are automatic 0.4 kV reactive power compensation units without reactors, from 10.2 kVAr to over 1000 kVAr. They are intended for networks with low and medium harmonic levels.

Mains voltage: 400–415 V (GE 230V — 230 V)
Power: 10.2 kVAr … over 1000 kVAr (G3E … G8E in several sections)
Permissible mains THD(I): B15 — 15 %; B35, GE 230V — 25 %; B50 — 35 %; DMP-FTV — 40 %
Capacitors: MKP; B50 and DMP-FTV — Heavy Duty twin-element

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Technical specifications

Mains voltage	400–415 V (GE 230V — 230 V)
Power	10.2 kVAr … over 1000 kVAr (G3E … G8E in several sections)
Permissible mains THD(I)	B15 — 15 %; B35, GE 230V — 25 %; B50 — 35 %; DMP-FTV — 40 %
Capacitors	MKP; B50 and DMP-FTV — Heavy Duty twin-element
Controller	BMR4 / BMR6 / HPR6 / HPR12
Enclosures	G3E, G4E (IP30), G4RM (IP40), G6E, G8E, G9E (IP31)
Contactors	AC6-b with pre-insertion resistors
Monitoring	CCS (standard on DMP-FTV)
Standards	IEC/EN 61439-1/2, IEC/EN 61921; capacitors IEC/EN 60831-1/2 (IMQ)

Specifications are taken from the manufacturer’s technical documentation. Updated 11/13/2026.

Description

A microprocessor controller measures reactive power in four quadrants and switches the steps with contactors, so the set power factor is held without penalties for reactive energy. B15 is for 400 V networks with current THD up to 15 % and an 8-hour duty cycle, B35 is for industry with THD up to 25 %, and B50 is for THD up to 35 % (up to 80 % on the capacitors) and continuous operation with twin-element Heavy Duty capacitors. DMP-FTV is designed for THD up to 40 %, small photovoltaic plants and continuous duty, with Heavy Duty capacitors and CCS monitoring as standard, while GE 230V works in three-phase 230 V networks. The range starts at 10.2 kVAr (G3E, 3 steps of 3.4 kVAr), then 50–100 kVAr (G3E/G4E), 125–250 kVAr (G4RM), 300–500 kVAr (G6E) and 525–1050 kVAr and more (G8E in several sections), with up to 16 steps. Controllers are BMR4, BMR6, HPR6 and HPR12. Cabinets are made of sheet steel with an epoxy coating RAL 7035, IP30 (G3E, G4E), IP40 (G4RM), IP31 (G6E, G8E, G9E), IP20 inside, and the steps in G6, G8 and G9 slide out to the front. The units have a three-pole isolator with door interlock, NH-00 gG 100 kA fuses, AC6-b contactors with pre-insertion resistors and low-smoke FS17 cables. The capacitors are MKP with pressure protection, with losses up to 0.4 W/kVAr. Tripping occurs on high THDi, overheating above 50 °C, and minimum or maximum voltage, the dry contact operates above 70 °C, and ventilation is natural up to 200 kVAr and forced above that. Standards are IEC/EN 61439-1/2 and 61921, capacitors IEC/EN 60831-1/2 (IMQ V1927), operation at −5…+40 °C at altitudes up to 1000 m.

How to choose

The series is chosen by the current THD of the network. B15 suits up to 15 %, B35 and GE 230V up to 25 %, B50 up to 35 %, and DMP-FTV up to 40 %. The enclosure from G3E to G8E depends on the power, and for continuous duty with higher harmonics B50 or DMP-FTV with twin-element Heavy Duty capacitors is used.