1 Technical description
BK-W, BKD-W
BK-W Reactive power compensators are designed for compensating reactive power (improving power coefficient cos? ) in low voltage networks in industrial sites and division stations.In the event that higher current and voltage harmonics are present, we also provide BKD-W reactive power compensators with reactors. Thanks to implementation a reactive power compensation modern micro-possessor type REGO 5 (7.12) reactive power controlls, the device automatical-ly adapts the power of activated capacitors to network
requirements so that the required power coefficient is maintained at all times. The reactive power compensator ensures highest efficiency and thus quick return on investment by eliminating reactive power charges and reducing active power bills by 3 to 7%.
The reactive power compensator is made as a freestanding cubicle made of steel sheets (optionally aluminium sheets), which are electrostatically powder painted. The design is compact, easy to assemble and anaesthetic. Cubicle door is equipped with: • Control switch (disconnecting
all capacitors), • indicator lamps, • REGO 5(7.12) regulator, • regulator power indicator. A single capacitor circuit comprises:
a
a
Reactive power
compensator design
• Regulator control output, • switch-fuse unit acting as a
protection device,
• contactor with a resistor, which activates a capacitor, • power capacitor.
Protection device rating and the type of contactor are selected individually depending on the capacitor size in a given unit. BK-W power cables can be run from the top or bottom (location where the cables are run can be also selected). Compact construction saves space while the modular design allows expansion of the reactive power compensator or increasing its rated power.
BK-W reactive power compensator features advanced three-phase power capacitors produced by the Italian company DUCATI energia s. p. a.These are dry type capacitors which are non-toxic and neutral to the environment.Capacitor coils are made of metallised polypropyle-ne film and part equipped with overpressure, overload protection device.
In the event of a local arcing, the dielectric regenerates itself. Individual capacitor phases are equipped with induction coils limiting inrush current, which extend capacitor and switchgear lifetime.Optionally power regulator and capacitors of reactive power compensator can be provided by another manufacturer. a
Compliance with
standards
aBK-W switchgear meets the requirements of the following standards:
• PN-EN 61921:2005 Power capacitors - Low-voltage power factor correction banks";
• PN-EN 60439-1:2003 +A1:200
„Low-voltage switchgear and controlgear assemblies. Part 1: Type-tested and partially type-tested assemblies”;
• PN-EN 60529 : 2003 „Degrees of protection provided by enclosures (IP code)”;
Certified by the Electrotechnical Institute Reactive power compensators incorporated in ZR-W and Instal-Blok switchgear cubicles are embedded in their structure.
Lo w v o lt a g e sw it ch g ea r
Specification of low voltage reactive power compensators installed in BK-W switchgear cubicles:
Rated frequency 50 [Hz] (60 [Hz] on special order)
Rated voltage 230, 400, 415, 450, 550 [V]
Ambient temperature -25 [C]... +50 [C]
Enclosure degree of protection IP 4X
Capacitance tolerance -5%... +10%
Overload protection Overpressure
Discharge resistors Discharge down to 50V within one minute
Total active power losses 0,5 [W/kVAr]
Maximum operating voltage 1,1 UN
Maximum operating current 1,3 IN
Test voltage
-terminal to terminal 2UN/50Hz/2s
-terminal to enclosure 3kV/50Hz/10s
Operating position customer's choice
Compliance with standards CEI 33-5, IEC 831, PN-EN 61921:2005
Capacitor specification for UN = 400V
Power QN [kVAr] Current IN [A] Capacitance CN [F] Dimension L [mm] Weight [kg] 5 10 12,5 15 20 25 30 40 50 7,2 14,4 18 21,7 28,9 36,1 43,3 57,7 72,2 3 x 33,2 3 x 66,3 3 x 82,9 3 x 99,6 3 x 132,6 3 x 166 3 x 199 3 x 265 3 x 332 79 79 79 148 148 148 217 286 286 2,3 2,3 2,3 4,8 5 5 7,5 10 10
Operation principle
a
Reactive power compensator allows compensating reactive power according to regulator settings by switching on and off individual capacitors. Figure 1.1 presents a simplified diagram showing connection of reactive power compensator to network
grid.
Reactive power regulator determines the technical specification and operating parameters. For metering methods and reactive power compensator control process please refer to REGO 5(7.12) regulator Operator's Manual.
Figure 1.1. Reactive power compensator connection to power grid
BK-W reactive power compensator basic technical data
Type BK-W
Rated reactive power 50 ÷ 480 kVAr *
Rated power per steps 5 ÷ 60 kVAr *
Number of compensation steps 4 ÷ 12
Rated voltage 400 V
Rated insulation voltage 0,69 V
Rated frequency 50 Hz
Rated short-time withstand current of busbars 20 kA (1s)
Rated peak current strength of busbars 40 kA
Degree of protection IP 3X
Compatibility with a current transformer 5 [A]
Power supply From the bottom or top
* consult the manufacturer to design BK-W the reactive power compensator with higher rated power
1
BK-W
reactive
power
compensator
Receiver network to be compensated
Lo w v o lt a g e sw it ch g ea r
m
Example of reactive power compensator capacitor bank diagram
4 3 9 10 11 12 2 8 7 5 6 C o p p e r b u s b a rs WT N-0 0C 2 0A K 11 2 m 0 m Y 1 LG 2x Q = 40 k V A r WT N-0 0C 8 0A RB K 0 00 2 4 6 1 3 5 K 10 2 m 0 m Y 1 LG 2x Q = 40 k V A r WT N-0 0C 8 0A RB K 0 00 2 4 6 1 3 5 K 9 2 2x LG Y 1 0 m m Q = 40 k V A r WT N-0 0C 8 0A RB K 0 00 2 4 6 1 3 5 K 5 2 m 0 m Y 1 LG WT N-0 0C 4 0A RB K 0 00 2 4 6 1 3 5 Q = 20 k V A r K 4 2 m 0 m Y 1 LG WT N-0 0C 4 0A RB K 0 00 2 4 6 1 3 5 Q = 20 k V A r K 3 2 m 0 m Y 1 LG WT N-0 0C 4 0A RB K 0 00 2 4 6 1 3 5 Q = 20 k V A r K 8 2 m 0 m Y 1 LG 2x Q = 40 k V A r WT N-0 0C 8 0A RB K 0 00 2 4 6 1 3 5 K 7 2 m 0 m Y 1 LG 2x Q = 40 k V A r WT N-0 0C 8 0A RB K 0 00 2 4 6 1 3 5 K 2 2 m m Y 4 LG Q = 10 k V A r WT N-0 0C 2 0A RB K 0 00 2 4 6 1 3 5 K 6 2 m 0 m Y 1 LG 2x Q = 40 k V A r WT N-0 0C 8 0A RB K 0 00 2 4 6 1 3 5 K 1 A 2 A 1 K 2 A 2 A 1 K 3 A 2 A 1 K 4 A 2 A 1 K 5 A 2 A 1 K 6 A 2 A 1 K 7 A 2 A 1 K 8 A 2 A 1 K 9 A 2 A 1 K 1 0 A 2 A 1 K 1 1 A 2 A 1 A 1 2 3 4 5 6 7 8 9 1 0 1 1 1 2
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3 4 5 6 7 8 9 1 0 1 1 1 2 1 3 1 4 L 1 L 2 L 3 N B 2 C L S 6 B 6 B 3 C L S 6 B 6 1 1 1 2 2 2 5 3 1 6 4 2 B 4 C L S 6 C 2 B 5 CLS 6 C 2 B 6 C L S 6 C 2 N E F L 1 L 2 L 3 N E F N E F N E F B 7 CLS 6 C 2 R M W en t. K T S K L 4 0 0 0Examples of configuration
- Reactive power compensator powered by main busbars of LV switchgear - Rated power of BK-W2 and BKD-W2
up to 190 kVAr
- maximum number of steps - 6; - REGO 5(7.12) power regulator - depth of BK-W2 is 400 or 320 mm - depth of BKD-W2 is 400 mm - reactive power compensator powered
by main busbars of LV switchgear - rated power of BK-W1 and BKD-W1 up
to 110 kVAr
- maximum number of steps - 4; - REGO 5(7.12) power regulator - depth of BK-W1 is 400 or 320 mm - depth of BKD-W1 is 400 mm
- reactive power compensator powered by main busbars of LV switchgear - rated power of BK-W3 up to 190kVAr - maximum number of stages - 6; - REGO 5(7.12) power regulator - depth of BK-W3 is 400 or 320 mm Electrical diagram Front view
BK-W
BKD-W
Electrical diagramFront view
Description
Nie dotykać! Urządzenie elektryczne REACTIVE POWER COMPENSATOR REGULATOR 1 2 7 5 550 BK-W1 (up to 110 kVAr maximum 4 steps) BKD-W1 (up to 110 kVAr maximum 4 steps) Nie dotykać! Urządzenie elektryczne REACTIVE POWER COMPENSATOR REGULATOR 1 2 7 5 850 Nie dotykać! Urządzenie elektryczne REACTIVE POWER COMPENSATOR REGULATOR 1 9 5 0 550 BK-W2 (up to 190 kVAr maximum 6 steps) BKD-W2 (up to 190 kVAr maximum 6 steps) Nie dotykać! Urządzenie elektryczne REACTIVE POWER COMPENSATOR REGULATOR 1 9 5 0 850 Nie dotykać! Urządzenie elektryczne REACTIVE POWER COMPENSATOR REGULATOR 1 2 7 5 850 BK-W3 (up to 190 kVAr maximum 6 steps) Lo w v o lt a g e sw it ch g ea r
Electrical diagram Front view
BK-W
BKD-W
Electrical diagramFront view
Description
- Reactive power compensator powered by main busbars of LV switchgear
- Rated power of BK-W5 and BKD-W5 up to 360 kVAr - maximum number of steps -
12;
- REGO 5(7.12) power regulator - depth of BK-W5 is 400 or 320
mm
- depth of BKD-W5 is 600 mm
- Reactive power compensator powered by main busbars of LV switchgear
- Rated power of BK-W6 and BKD-W1 up to 480 kVAr - maximum number of steps -
12;
- REGO 5(7.12) power regulator - depth of BK-W6 is 400 or 320
mm
- reactive power compensator powered by main busbars of LV switchgear
- rated power of BK-W4 and BKD-W4 up to 240 kVAr - maximum number of steps -
6;
- REGO 5(7.12) power regulator - depth of BK-W4 is 400 or 320 mm depth of BKD-W4 is 600 mm Nie dotykać! Urządzenie elektryczne REACTIVE POWER COMPENSATOR REGULATOR 1 9 5 0 850 BKD-W4 (up to 240 kVAr maximum 6 steps) Nie dotykać! Urządzenie elektryczne REACTIVE POWER COMPENSATOR REGULATOR 1 9 5 0 750 BK-W4 (up to 240 kVAr maximum 6 steps) Nie dotykać! Urządzenie elektryczne REACTIVE POWER COMPENSATOR REGULATOR 1 9 5 0 850 BK-W5 (up to 360 kVAr maximum 12 steps) BKD-W5 (up to 360 kVAr maximum 12 steps) Nie dotykać! Urządzenie elektryczne REACTIVE POWER COMPENSATOR REGULATOR 1 9 5 0 1100 Nie dotykać! Urządzenie elektryczne BK-W6 (up to 480 kVAr maximum 12 steps) BKD-W6 (up to 480 kVAr maximum 12 steps) Nie dotykać! Urządzenie elektryczne REACTIVE POWER COMPENSATOR REGULATOR 1 9 5 0 Nie dotykać! Urządzenie elektryczne REACTIVE POWER COMPENSATOR REGULATOR Nie dotykać! Urządzenie elektryczne Nie dotykać! Urządzenie elektryczne 1 9 5 0
Front view
BK-W
Electrical diagram
Description
- power supply from the top - Rated power of BK-W8 up to
240 kVAr
- maximum number of steps - 6;
- REGO 5(7.12) power regulator - depth of BK-W8 is 400 or 320
mm
- power supply from the top - Rated power of BK-W7 up to
240 kVAr
- Maximum number of steps - 6;
- REGO 5(7.12) power regulator - depth of BK-W7 is 400 or 320 mm BK-W7 (up to 240 kVAr maximum 6 steps) Nie dotykać! Urządzenie elektryczne REACTIVE POWER COMPENSATOR REGULATOR 1 9 5 0 850 RBK3 or NH switch disconnector-BK-W8 (up to 240 kVAr maximum 6 steps) Nie dotykać! Urządzenie elektryczne REACTIVE POWER COMPENSATOR REGULATOR 1 9 5 0 850 MCCB 250÷630 A Lo w v o lt a g e sw it ch g ea r