KLD-DVR Series Dynamic Voltage Regulation Real-time Control Equipment

Real-time Controlled Dynamic Voltage Regulator Device— Off-line Short-time Energy Compensation Solution. When voltage dip(sag) or swell occur, it can rapidly provide non-drop-out switching support for loads and guarantee the integrity of power-supply voltage.

PRODUCT OVERVIEW

With the rapid development of modern power industry and significant changes in the load structure of the power system, social production and precision manufacturing are growingly dependent on electronic equipment. For end-users, voltage dips(sag) has become a major concern.

According to authoritative data from EPRI, over 92% of power quality events are voltage dips(sags) and swells, while other power quality events account for less than 8%. Voltage dips(sag) has been identified by numerous international research institutions as the most frequent event in power systems. Therefore, it is particularly critical to implement voltage dip(sag) / swell protection for sensitive equipment. The KLD-DVR Series Real-time Controlled Dynamic Voltage Regulator serves as a solution for voltage dip(sag) and swell. It can correct voltage in real time and rapidly, solving voltage dip(sag), swell and short-time interruption problems in power supplies for social production or precision manufacturing, and keep loads running without power-supply interruption.

VOLTAGE DIP

According to IEEE standards and IEC61000-4-11 & IEC61000-4-34, voltage dip(sag) is defined as: the RMS value of voltage at a point in the power system suddenly drops to 0.1 p.u~0.9 p.u (10%~90% of rated voltage), and returns to the normal level after a short duration ranging from 10 ms to 1 min.

OPERATION MODE INTRODUCTION

01 — Grid voltage is normal

When grid voltage is normal, KLD-DVR works in grid-fed mode; the grid supplies power directly to the load.

02 — Grid voltage dips(sags) or power failure

When grid voltage dips(sags) or power failure occurs, KLD-DVR switches to inverter-fed mode. Energy stored in supercapacitors is converted into standard-quality voltage source by bidirectional converter to power the load.

03 — Grid voltage recovers

After grid voltage recovers, DVR returns to grid-fed mode. The grid feeds the load directly. Meanwhile, the bidirectional converter draws energy from output side to recharge supercapacitors.

04 — Fault bypass operation

If the static switch trips due to fault, the fault bypass switch will be closed immediately to guarantee uninterrupted normal power supply for loads.

05 — Maintenance bypass operation

When KLD-DVR is under maintenance, load current is automatically transferred to the bypass switch, and the grid supplies power to the load directly.

HIGH-VOLTAGE DVR

KLD-DVR high-voltage DVR is an off-line series voltage compensation device for high-voltage distribution networks. It mitigates various transient-voltage disturbances including deep voltage dip(sag), swell and short-time voltage interruption.

Adopting low-voltage inversion plus step-up transformer topology, it is connected in series into 10 kV busbar via static switch. Supercapacitor energy storage provides voltage support with fully automatic operation. When bus voltage is normal, bypass conducts and the unit runs in low-power standby status. Upon detection of voltage abnormality, the control system triggers compensation within millisecond level. The inverter unit generates compensation voltage, which is superimposed onto busbar through step-up transformer to rapidly restore bus voltage to rated value with no manual intervention required.

FAST COMPENSATION EFFECT

DVR series delivers fast and precise protection for critical user-side equipment, avoiding economic loss caused by equipment shutdown triggered by voltage dip(sag) / swell. Even when grid voltage drops to zero, the unit can output full 100% rated voltage to sustain normal equipment operation. Typical total response time is less than 2 ms.

Technical Parameters

KLD-DVR Standard type

Input
Rated AC input line-to-line voltage	200V-400V
Grid frequency range	50/60±2.5Hz
Wiring Method	3-phase 3-wire / 3-phase 4-wire
Operational efficiency	>99%
Output
Compensation capability	0~130% rated voltage (full-depth dip & swell coverage)
Short-time power-failure support duration	0~5s (supercapacitor capacity customizable)
Output frequency	50+0.01Hz or 60+0.01Hz
Voltage compensation accuracy	≤±1%
Voltage THD	≤3%
Voltage unbalance (negative-sequence / positive-sequence)	＜3% under 100% unbalanced-load condition
Overload capacity	150% rating, 10 s duration
Performance Index
Voltage dip compensation	Supported
Voltage swell compensation	Supported
Mechanical maintenance bypass	Supported
Total response time	Typical value ＜2 ms
Acoustic noise	≤60db (100% load)
Cooling method	Forced-air cooling / natural-air cooling
Protection functions	Short-circuit protection; DC-bus under-voltage / over-voltage protection; power-semiconductor fault protection; overload protection, etc.
Human-machine interface	Large-size touch-screen display
Communication	RS485, Ethernet, MODBUS protocol; remote monitoring supported
Ambient Conditions
Operating ambient temperature	-25℃~+45℃
Relative humidity	Max. 95%RH (non-condensing)
Storage temperature	-40℃~+70℃
Altitude	≤2000 m; derate power by 1% per additional 100 m above 2000 m
Ingress protection class	IP54/IP20 (outdoor / indoor optional)

KLD-DVR High-voltage type

Input
Rated AC input line-to-line voltage	10kV
Grid frequency range	48.5Hz~51.5Hz
Wiring Method	3-phase 3-wire
Operational efficiency	>99%
Output
Compensation capability	0~130% rated voltage (full-depth dip & swell coverage)
Short-time power-failure support duration	0~5s (supercapacitor capacity customizable)
Output frequency	50±0.01Hz
Voltage compensation accuracy	≤±1%
Voltage THD	≤3%
Voltage unbalance (negative-sequence / positive-sequence)	＜3% under 100% unbalanced-load condition
Overload capacity	150% rating, 10 s duration
Performance Index
Voltage dip compensation	Supported
Voltage swell compensation	Supported
Mechanical maintenance bypass	Supported
Total response time	Typical value ＜2 ms
Acoustic noise	≤60db (100% load)
Cooling method	Forced-air cooling / natural-air cooling
Protection functions	Short-circuit protection; DC-bus under-voltage / over-voltage protection; power-semiconductor fault protection; overload protection, etc.
Human-machine interface	Large-size touch-screen display
Communication	RS485, Ethernet, MODBUS protocol; remote monitoring supported
Ambient Conditions
Operating ambient temperature	-25℃~+45℃
Relative humidity	Max. 95%RH (non-condensing)
Storage temperature	-40℃~+70℃
Altitude	≤2000 m; derate power by 1% per additional 100 m above 2000 m
Ingress protection class	IP54/IP20 (outdoor / indoor optional)

*Note: Operational efficiency for high-voltage model excludes transformer loss.

Technical Parameters

Input

Rated AC input line-to-line voltage: 200V-400V

Grid frequency range: 50/60±2.5Hz

Wiring Method: 3-phase 3-wire / 3-phase 4-wire

Operational efficiency: >99%

Output

Compensation capability: 0~130% rated voltage (full-depth dip & swell coverage)

Short-time power-failure support duration: 0~5s (supercapacitor capacity customizable)

Output frequency: 50+0.01Hz or 60+0.01Hz

Voltage compensation accuracy: ≤±1%

Voltage THD: ≤3%

Voltage unbalance (negative-sequence / positive-sequence): ＜3% under 100% unbalanced-load condition

Overload capacity: 150% rating, 10 s duration

Performance Index

Voltage dip compensation: Supported

Voltage swell compensation: Supported

Mechanical maintenance bypass: Supported

Total response time: Typical value ＜2 ms

Acoustic noise: ≤60db (100% load)

Cooling method: Forced-air cooling / natural-air cooling

Protection functions: Short-circuit protection; DC-bus under-voltage / over-voltage protection; power-semiconductor fault protection; overload protection, etc.

Human-machine interface: Large-size touch-screen display

Communication: RS485, Ethernet, MODBUS protocol; remote monitoring supported

Ambient Conditions

Operating ambient temperature: -25℃~+45℃

Relative humidity: Max. 95%RH (non-condensing)

Storage temperature: -40℃~+70℃

Altitude: ≤2000 m; derate power by 1% per additional 100 m above 2000 m

Ingress protection class: IP54/IP20 (outdoor / indoor optional)

Input

Rated AC input line-to-line voltage: 10kV

Grid frequency range: 48.5Hz~51.5Hz

Wiring Method: 3-phase 3-wire

Operational efficiency: >99%

Output

Compensation capability: 0~130% rated voltage (full-depth dip & swell coverage)

Short-time power-failure support duration: 0~5s (supercapacitor capacity customizable)

Output frequency: 50±0.01Hz

Voltage compensation accuracy: ≤±1%

Voltage THD: ≤3%

Voltage unbalance (negative-sequence / positive-sequence): ＜3% under 100% unbalanced-load condition

Overload capacity: 150% rating, 10 s duration

Performance Index

Voltage dip compensation: Supported

Voltage swell compensation: Supported

Mechanical maintenance bypass: Supported

Total response time: Typical value ＜2 ms

Acoustic noise: ≤60db (100% load)

Cooling method: Forced-air cooling / natural-air cooling

Protection functions: Short-circuit protection; DC-bus under-voltage / over-voltage protection; power-semiconductor fault protection; overload protection, etc.

Human-machine interface: Large-size touch-screen display

Communication: RS485, Ethernet, MODBUS protocol; remote monitoring supported

Ambient Conditions

Operating ambient temperature: -25℃~+45℃

Relative humidity: Max. 95%RH (non-condensing)

Storage temperature: -40℃~+70℃

Altitude: ≤2000 m; derate power by 1% per additional 100 m above 2000 m

Ingress protection class: IP54/IP20 (outdoor / indoor optional)

*Note: Operational efficiency for high-voltage model excludes transformer loss.

Selection Table

KLD-DVR 3L Standard type

Model	Rated Capacity (kVA)	System Voltage(V)	Type	Ingress Protection
KLD-DVR50-3L-400V	50	400	Standard-type	IP20
KLD-DVR100-3L-400V	100	400	Standard-type	IP20
KLD-DVR150-3L-400V	150	400	Standard-type	IP20
KLD-DVR200-3L-400V	200	400	Standard-type	IP20
KLD-DVR300-3L-400V	300	400	Standard-type	IP20
KLD-DVR400-3L-400V	400	400	Standard-type	IP20
KLD-DVR500-3L-400V	500	400	Standard-type	IP20
KLD-DVR600-3L-400V	600	400	Standard-type	IP20
KLD-DVR1000-3L-400V	1000	400	Standard-type	IP20
KLD-DVR1500-3L-400V	1500	400	Standard-type	IP20
KLD-DVR2000-3L-400V	2000	400	Standard-type	IP20
KLD-DVR2500-3L-400V	2500	400	Standard-type	IP20

KLD-DVR 4L Standard type

Model	Rated Capacity (kVA)	System Voltage(V)	Type	Ingress Protection
KLD-DVR50-4L-400V	50	400	Standard-type	IP20
KLD-DVR100-4L-400V	100	400	Standard-type	IP20
KLD-DVR150-4L-400V	150	400	Standard-type	IP20
KLD-DVR200-4L-400V	200	400	Standard-type	IP20
KLD-DVR300-4L-400V	300	400	Standard-type	IP20
KLD-DVR400-4L-400V	400	400	Standard-type	IP20
KLD-DVR500-4L-400V	500	400	Standard-type	IP20
KLD-DVR600-4L-400V	600	400	Standard-type	IP20
KLD-DVR1000-4L-400V	1000	400	Standard-type	IP20
KLD-DVR1500-4L-400V	1500	400	Standard-type	IP20
KLD-DVR2000-4L-400V	2000	400	Standard-type	IP20
KLD-DVR2500-4L-400V	2500	400	Standard-type	IP20

KLD-DVR 3L High-voltage type

Model	Rated Capacity (kVA)	System Voltage(V)	Type	Ingress Protection
KLD-DVR200-3L-10kV	200	10	High-voltage-type	IP54
KLD-DVR300-3L-10kV	300	10	High-voltage-type	IP54
KLD-DVR400-3L-10kV	400	10	High-voltage-type	IP54
KLD-DVR500-3L-10kV	500	10	High-voltage-type	IP54
KLD-DVR600-3L-10kV	600	10	High-voltage-type	IP54
KLD-DVR1000-3L-10kV	1000	10	High-voltage-type	IP54
KLD-DVR1250-3L-10kV	1250	10	High-voltage-type	IP54
KLD-DVR1500-3L-10kV	1500	10	High-voltage-type	IP54
KLD-DVR2000-3L-10kV	2000	10	High-voltage-type	IP54
KLD-DVR2500-3L-10kV	2500	10	High-voltage-type	IP54
KLD-DVR3000-3L-10kV	3000	10	High-voltage-type	IP54
KLD-DVR3200-3L-10kV	3200	10	High-voltage-type	IP54

Selection Table

KLD-DVR 3L Standard type

Rated Capacity (kVA)：50
System Voltage(V)：400
Type：Standard-type
Ingress Protection：IP20

Rated Capacity (kVA)：100
System Voltage(V)：400
Type：Standard-type
Ingress Protection：IP20

Rated Capacity (kVA)：150
System Voltage(V)：400
Type：Standard-type
Ingress Protection：IP20

Rated Capacity (kVA)：200
System Voltage(V)：400
Type：Standard-type
Ingress Protection：IP20

Rated Capacity (kVA)：300
System Voltage(V)：400
Type：Standard-type
Ingress Protection：IP20

Rated Capacity (kVA)：400
System Voltage(V)：400
Type：Standard-type
Ingress Protection：IP20

Rated Capacity (kVA)：500
System Voltage(V)：400
Type：Standard-type
Ingress Protection：IP20

Rated Capacity (kVA)：600
System Voltage(V)：400
Type：Standard-type
Ingress Protection：IP20

Rated Capacity (kVA)：1000
System Voltage(V)：400
Type：Standard-type
Ingress Protection：IP20

Rated Capacity (kVA)：1500
System Voltage(V)：400
Type：Standard-type
Ingress Protection：IP20

Rated Capacity (kVA)：2000
System Voltage(V)：400
Type：Standard-type
Ingress Protection：IP20

Rated Capacity (kVA)：2500
System Voltage(V)：400
Type：Standard-type
Ingress Protection：IP20

KLD-DVR 4L Standard type

Rated Capacity (kVA)：50
System Voltage(V)：400
Type：Standard-type
Ingress Protection：IP20

Rated Capacity (kVA)：100
System Voltage(V)：400
Type：Standard-type
Ingress Protection：IP20

Rated Capacity (kVA)：150
System Voltage(V)：400
Type：Standard-type
Ingress Protection：IP20

Rated Capacity (kVA)：200
System Voltage(V)：400
Type：Standard-type
Ingress Protection：IP20

Rated Capacity (kVA)：300
System Voltage(V)：400
Type：Standard-type
Ingress Protection：IP20

Rated Capacity (kVA)：400
System Voltage(V)：400
Type：Standard-type
Ingress Protection：IP20

Rated Capacity (kVA)：500
System Voltage(V)：400
Type：Standard-type
Ingress Protection：IP20

Rated Capacity (kVA)：600
System Voltage(V)：400
Type：Standard-type
Ingress Protection：IP20

Rated Capacity (kVA)：1000
System Voltage(V)：400
Type：Standard-type
Ingress Protection：IP20

Rated Capacity (kVA)：1500
System Voltage(V)：400
Type：Standard-type
Ingress Protection：IP20

Rated Capacity (kVA)：2000
System Voltage(V)：400
Type：Standard-type
Ingress Protection：IP20

Rated Capacity (kVA)：2500
System Voltage(V)：400
Type：Standard-type
Ingress Protection：IP20

KLD-DVR 3L High-voltage type

Rated Capacity (kVA)：200
System Voltage(V)：10
Type：High-voltage-type
Ingress Protection：IP54

Rated Capacity (kVA)：300
System Voltage(V)：10
Type：High-voltage-type
Ingress Protection：IP54

Rated Capacity (kVA)：400
System Voltage(V)：10
Type：High-voltage-type
Ingress Protection：IP54

Rated Capacity (kVA)：500
System Voltage(V)：10
Type：High-voltage-type
Ingress Protection：IP54

Rated Capacity (kVA)：600
System Voltage(V)：10
Type：High-voltage-type
Ingress Protection：IP54

Rated Capacity (kVA)：1000
System Voltage(V)：10
Type：High-voltage-type
Ingress Protection：IP54

Rated Capacity (kVA)：1250
System Voltage(V)：10
Type：High-voltage-type
Ingress Protection：IP54

Rated Capacity (kVA)：1500
System Voltage(V)：10
Type：High-voltage-type
Ingress Protection：IP54

Rated Capacity (kVA)：2000
System Voltage(V)：10
Type：High-voltage-type
Ingress Protection：IP54

Rated Capacity (kVA)：2500
System Voltage(V)：10
Type：High-voltage-type
Ingress Protection：IP54

Rated Capacity (kVA)：3000
System Voltage(V)：10
Type：High-voltage-type
Ingress Protection：IP54

Rated Capacity (kVA)：3200
System Voltage(V)：10
Type：High-voltage-type
Ingress Protection：IP54

Contact Us

Breaking barriers, innovating forward to achieve dual success at home and abroad, Dison Krod Group is honored as a National Green Factory and National SRUI "Little Giant" Enterprise..

Beijing Office: B31C, Universal Business Park, 10 Jiuxianqiao Road, Chaoyang District, Beijing City, China

Shanghai Office: Building 3, Convention & Exhibition Center of International Sourcing, No.235 Yunling East Road, Putuo District, Shanghai City, China

Hangzhou Office: Room 801, 8th Floor, Building 2, East Station Garden Business Center, No.768 Huanzhan East Road, Jianqiao Subdistrict, Shangcheng District, Hangzhou City, Zhejiang Province, China

Address

Kunshan Factory: No.666 Wengzi Road, Zhoushi Town, Kunshan City, Jiangsu Province, China

E-mail

sale@tysen-kld.com

+86 180 1811 1778

Hours

Monday-Friday: 9am to 6pm

KLD-DVR Series Dynamic Voltage Regulation Real-time Control Equipment

PRODUCT OVERVIEW

VOLTAGE DIP