EC520 Series

Solar Pump VFD

The EC520 Series is a solar pump drive designed for water supply and irrigation systems. Its built-in MPPT control adapts pump operation to changing sunlight, while AC grid input can provide an alternative supply when solar power is insufficient. Water-level, dry-run and low-irradiance protection functions support reliable operation, and flexible motor control and communication options help the drive fit different pumping installations.

Key features

The EC520 Series is a dedicated variable frequency drive for solar photovoltaic water-pump systems.
An optimized maximum power point tracking (MPPT) algorithm helps the pump motor adapt to changing solar input in agricultural and irrigation applications.
The system normally runs on solar power and can also use an AC grid supply when sunlight is insufficient.
Built-in protection functions respond to water shortage, insufficient solar irradiance and abnormal high or low water levels.
Supports V/F and sensorless vector control (SVC) for both induction motors (IM) and permanent-magnet motors (PM), with application functions including torque and PID control.
Allows one-touch switching between control functions for induction and permanent-magnet motors.
Uses IGBT modules from major suppliers such as Fuji and Starpower, with customized options available. A 32-bit ARM processor, dedicated short-circuit protection chip, high-quality capacitors and modular PCB design support protection and real-time monitoring.
Features an adjustable-speed, dual-ball-bearing NMB cooling fan with hot-plug support and an ABS flame-retardant enclosure.
A detachable, hot-pluggable two-line LED keypad supports RJ45 extension cables up to 30 m.
Built-in power and status indicators remain visible for on-site operation and monitoring when the keypad is removed.
A standard RS485 port supports Modbus RTU communication. Firmware can be upgraded through USB or a serial connection.

Details

Specifications

Mounting dimensions in millimetres by voltage class and rated power.

380 V class

Power (kW)	W (mm)	W1	H	H1	D	Mounting hole	Diagram
0.75	126	115	187	175	160	φ 4.6	Figure 4-1
1.5
2.2
4.0
5.5
7.5	146	131	257	243	173	φ 5.8
11	146	131	257	243	173	φ 5.8
15	170	151	320	303	195	φ 5.8
18.5
22
30	180	120	425	405	204	φ 9
37	180	120	425	405	204	φ 9
45	200	120	510	490	230	φ 9
55	200	120	510	490	230	φ 9