1、Scope of Applicatio
CDJ Low-Voltage Reactive Power Compensation Device
n
The CDJ Low-Voltage Reactive Power Compensation Device integrates low-voltage
distribution output, reactive power compensation, energy metering, and distribution
parameter recording into a single unit. It is designed for installation on outdoor 10/0.4 kV
substations and transformers up to 500 kV in both urban and rural areas. This product has
obtained the 3C certification from the National Quality Certification Center, with all
technical specifications fully compliant with GB/T 15576-95 “Static Compensating Devices
for Low-Voltage Reactive Power”. Featuring compact size, easy installation, strong
versatility, and excellent performance, it is widely applicable in rural and urban public
power grid systems.
2、Application Over-
view
This product is independently installed on the support frame of a pole-mounted
transformer for dual-sided maintenance. The cabinet houses an intelligent automatic
reactive power controller that operates using a six-step cyclic switching method. Based on
the level of inductive reactive power consumed by the grid load, it automatically controls
the switching of parallel capacitor banks at adjustable intervals ranging from 10 to 250
seconds, minimizing reactive power consumption, thereby improving grid voltage quality
and reducing losses in the transmission and distribution system as well as in transformers.
Additionally, the product cabinet is equipped with a switch for power output and shutdown operation. Given the specific
installation location of the device, the transformer’s high-voltage side power supply does not need to be disconnected when
the output switch fails or requires maintenance. The sub-output switch features a pull-out design, allowing the faulty switch to
be easily replaced using a handle, significantly reducing maintenance time and enabling prompt replacement within minutes.
Furthermore, the output switch employs a 4P configuration (N, A, B, C); when deactivating it, the neutral line is automatically
disconnected. This prevents potential voltage drift caused by three-phase imbalance in the output circuit that could energize
the neutral line, thereby ensuring safe power supply and improved power quality.
3、Structure Overv-
iew
This capacitive compensation power cabinet features an outdoor-oriented design with excellent protection against rain, water spray, moisture, and
small animals. The cabinet body is manufactured from 2mm high-quality stainless steel plates through pressing. To prevent reflection and refraction caused by
the glossy surface of the stainless steel, a rust-proof coating has been applied externally. Rubber sealing doors (equivalent to cable tower wheels) are installed
at the cable entry/exit ports. The top, bottom, and sides of the cabinet serve as ventilation openings; stainless steel mesh is welded onto the inner surfaces of
these ventilation areas, while several drainage holes are provided at the bottom. Internal wiring complies with system specifications. It incorporates a three-
phase five-wire busbar equipped with heat-shrink sleeves, and the cabinet housing bears a safety warning label reading “Caution: Electric Shock.”
4、Main Technical Paramet-
ers
4.1
Rated voltage: 0.38 kV or 0.4 kV AC
4.2
Rated frequency: 50 Hz
4.3 Rated capacity: 3–160 kvar;
4.4
Capacitance deviation: 0–+10%
4.5
Protection rating: IP20 for indoor use,
IP33 for outdoor use
4.6 Maximum allowable overvoltage: 1.1 Un
4.7
Maximum allowable overcurrent: 1.3 A
3.1
Ambient air temperature: -25°C to +40°C;
3.2
Relative temperature: ≤50% at 40°C, ≤90% at 20°
C
3.3 Altitude: ≤2000 m
3.4
Environmental conditions: No harmful gases or
vapors, no conductive or explosive dusts, and no
severe mechanical vibrations
5、Environmental Conditions for Use□
.
Made
high-qualit
Create high-quality products that give customers peace of
mind.
y
products
to
reassure
customers
7、Main Circuit Diagram
CDJ-01
CDJ-02
CDJ-03
JK
JK
Fa-c
JK
Fa-c
1-3FU
1-3FU
10F-·×6
orn
6QF
6KM
Qf2
1QF··×7
7QF
7KM
Q f1
Q f2
1QF··×8
8QF
1KM··×88KM
orn
Qf2
8、Product外形Profile Diagram
9、Model and Meaning
Capacitive
compen-
sation circuit; Switch
rated current; Output
circuit switch count
On-site compensation
Enterprise code for compa-
nies that manufacture box-
type
metering
and
power
distribution equipment:
22
6、List of Major Electrical Components
Element
Code name
Element
Name
(Taiwan Transformer): 315 KVA (90 kVAR)
(Taiwan Transformer): 400 KVA (105 kVAR)
(Taiwan Transformer): 500 KVA (120 kVAR)
Ts
Ts
Ts
TAa-c
Current transformer
LMk2-0.66600/s
3
LMk2-0.66800/s
3
LMk2-0.661000/s
3
1TA
Sampling current transformer
LMk2-0.66600/s
1
LMk2-0.66800/s
1
LMk2-0.661000/s
1
Fa-c
Lightning protector
HY1.5W-0.28/1.3
3
HY1.5W-0.28/1.3
3
HY1.5W-0.28/1.3
3
1-3FU
Fuse
NT2-250/250A
3
NT2-250/250A
3
NT2-250/250A
3
QF
Small Circuit Breaker
DE47-63/3P 32A
6
DE47-63/3P 32A
7
DE47-63/3P 32A
8
KM
Switching Capacitor Contactor
CJ16B-32/11-220V
6
CJ16B-32/11-220V
7
CJ16B-32/11-220V
8
JK
Automatic controller
JKL1BF-06
1
JKL1BF-08
1
JKL1BF-08
1
C
Self healing capacitor
BSMJ-0.45-15-3
6
BSMJ-0.45-15-3
7
BSMJ-0.45-15-3
8
KC
Thermostat
XMDT-2202-220V
Worker
XMDT-2202-220V
1
XMDT-2202-220V
Worker
QF1.QF2
Drawout breaker
HM3H-400/4P 315A
2
HM3H-400/4P 350A
2
HM3H-400/4P 400A
2