High Voltage Variable Frequency Drive

Wanlida variable frequency drive will be your best energy saving product for motors, good product will save more money for you.

Wanlida 3kV/3.3kV/6kV/6.6kV/10kV/11kV high voltage variable frequency drives

Product Structure

Wanlida Series high Voltage variable frequency drive consists of By-pass cabinet, Transformer cabinet, power unit cabinet and controller cabinet from left to right.

Working Principle

Wanlida high voltage variable frequency drive adopts multi-level cascaded power unit technology to obtain MV directly by means of overlap wave. Low voltage power unit is an actually improved motor variable frequency drive, which takes full advantage of mature technology. Wanlida variable frequency drive(VFD) belongs to High-high voltage source inverter, the customer can connect medium voltage (3/3.3/4.16/6/6.6/10/11KV) directly to input terminal of VFD, and then Wanlida variable frequency drive(VFD) output medium voltage (3/3.3/4.16/6/6.6/10/11KV)correspondingly, no need output step-up transformer.   

Voltage level (kV)	Cell quantity for each phase	Output phase voltage (V)	Output line voltage (kV)	Pulses	Number of voltage level for each phase
3/3.3	3	1732	3	18	7
4.16	4	2401	4.16	24	9
6	5	3450	6	30	11
6.6	6	3810	6.6	36	13
10	8	5770	10	48	17
11	9	6351	11	54	19

Technical parameters

SN	Parameters	Value
1	HVF Capacity	250~8750kVA
2	Power of adaptive motor	200~7000KW
3	Input Frequency	45~65Hz
4	Rated input voltage	3/3.3kV/4.16kV/6/6.6kV/10/11kV (+15%~ -35%)
5	THDi at power grid	<3% (Permissible value≤4%)
6	THDu at output side	<3% (Permissible value≤5%)
7	Input power factor	>0.95%(>20% of rated load)
8	Efficiency	>97%(under a rated load)
9	Output frequency(Hz)	0.5~120Hz
10	Output frequency resolution	0.01Hz
11	Rated output current(A)	36~600A
12	Overload capability	120%(1min), 150%(3s), 200%(Immediate protection)
13	Control mode	V/F control or Vector control
14	Logical control I/O signal	16 channels respectively
15	Analog input	0~10V/4~20mA
16	Analog output	0~10V/4~20mA Optional (2 channels)
17	Boolean input/output	Communications/Default point (expandable)
18	Acc & Dec time (S)	0.1~3000s
19	Communication with host	CAN, Profibus, Modbus, RS232, RS485 etc(Option)
20	Cooling mode	Forced air cooling
21	Storage temperature	00C~450C
22	Ambient temperature	-350C~+450C
23	Ambient humidity	95%, no condensation
24	Protection grade	IP40
25	Noise	<70DB

Technical advantages

No need of extra output filtering device

Directly driving the general medium voltage synchronous or asynchronous motor and the temperature of the motor will not be increased.

No need of motor derating operation

No dv/dt damage to insulation of motor and cable

No torque ripple induced by harmonics, and the service life of motors and mechanism devices can be extended

No cable length limited when voltage drop is in the allowable range.

Factory Acceptance Test Platform

Wanlida built the first-class high voltage and big capacity high voltage variable frequency drives test platform to realize Factory full load test before delivery.

 

High Voltage Variable Frequency Drive