EM303B Standard Inverter

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EM303B Standard Inverter

Open loop vector control inverter
3-phase 380 V-20%~415V+20%,0.75~400kW

EM303B helps an induction motor to achieve fast speed response and torque control ability as a DC motor which makes the motion control system stable,precise and quick.

1.Salient features

①. V/F & Sensorless Vector Control (SVC)

②. Dual CPU resulting in better performance & stability

③. Built-in DC reactor for 90kW- 400kW.
④. Stationary/Rotational auto tuning of motor parameters

⑤. Detachable standard LED keyboard with in-built potentiometer; Optional LCD keyboard

⑥. Normal duty (P)/Heavy duty (G) dual rated drive

⑦. Modbus RTU communication

⑧. Built-in PID control

⑨. Built-in braking IGBT up to 15kW

⑩. Programmable digital terminals:7 digital inputs & 2 digital outputs,3 multifunction outputs: 1 C/O relay & 2 open collector transistor

⑪. Analog terminals: 4 inputs & 2 outputs.All analog inputs can also be programmed as digital multifunction inputs.Analog outputs can be selected for voltage & current signals by changing jumper

⑫. Load disturbance compensation for trip free operation

⑬. Auto motor speed search at restart

⑭. Flange mounting (90~200kW) & floor mounting with optional chassis (5kW & above)

2.Wiring diagram

3.Specifications

Items		Specifications
Mains supply	Rated Voltage	3-phase 380 V-20%~415V+20%, 50/60Hz±5%, voltage imbalance rate<3%
Output	Output Voltage	3-phase, from 0 to mains supply
	Rated Output Current	100% rated current non-stop output
	Max. Overload Current	Model G:150% rated current for 1 minute, 180% rated current for 10 seconds Model P:120% rated current for 1 minute, 150% rated current for 10 seconds
Basic Control Functions	Control Mode	V/F, SVC (SVC0, SVC1)
	Input Mode	Frequency (Speed) input, torque input
	Running Mode	Keyboard, control terminals (2-wire sequence, 3-wire sequence), RS485
	Frequency Control Range	0.00~600.00Hz
	Input Frequency Resolution	Digital input: 0.01Hz Analog input: 0.1% of maximum frequency
	Speed Regulation Range	1:50 (V/F), 1:100 (SVC)
	Speed Control Accuracy	0.2% rated synchronous speed
	Acceleration/ Deceleration Time	0.01~600.00 seconds/minutes
	V/F Features	Rated output voltage: 20%~100% adjustable Frequency base: 20.00~600.00Hz adjustable
	Torque Boost	Automatic torque boost, fixed torque boost curve, customer defined V/F curve scaling
	Start Torque	150%/1Hz (V/F), 150%/0.5Hz (SVC)
	Torque Control Accuracy	±5% rated torque (SVC1)
	AVR	AVR is active while output voltage remains unchanged if input voltage is varying
	Automatic Current Limit	Automatically limit output current, avoid frequent overcurrent tripping
	DC Brake	Brake frequency: 0.1~60.0Hz, brake time: 0~30s Brake current: 0~150% rated current
	Signal Input Source	Communication, analog voltage, analog current, preset speed, simple PLC and their combinations
Special Functions	Textile Wobbulation	Realize textile wobbulation function like wobbulation range, time and jump
Input / Output Functions	Reference Power	10V/20mA
	Terminal Control Power	24V/150mA
	Digital Input Terminals	7 programmable digital input terminals
	Analog Input Terminals	4 analog inputs: 2 voltage input(0~10V) and 2 current inputs(0~20mA)
	Digital Output Terminals	2 OC outputs and 1 relay output are programmable. Maximum output current of OC: 50mA
	Digital Output Terminals	Relay contact capacity: 250VAC/3A or 30VDC/1A. When relay acts, EA-EC is N/O, and EB-EC is N/C
	Analog Output Terminals	2 programmable analog output terminals can output: 0~10V or 0~20mA
Keyboard Display	LED	Human interactions with displays and control actuators
Keyboard Display	Parameter Copy	Upload and download parameter information of the inverter, copy parameters rapidly
Protection	Protection	Overcurrent, overvoltage, short circuit, overload, phase loss, undervoltage, overheating, external faults, etc.
Application Conditions	Installation Site	Indoor, with altitude less than 1,000 meters, free from dust and corrosive gas, and direct sunlight
	Ambient Temperature	-10℃~+50℃. Derated from ambient +40℃~+50℃, 20%~90%RH (no condensation)
	Vibration	<0.5g
	Storage Temperature	-20℃~+65℃
	Installation Method	Wall mounting, flush mounting
Protection Grade		IP20
Cooling Method		Forced air cooling
Safety Standard		IEC61800-5-1:2007
EMC Standard		IEC61800-3:2004

4.Model Numbering Scheme

5.Model Number List

Remarks:

EM303B is an integrated model with G (fixed torque) and P (square torque) in one. The data listed above is of Model G. When applied to square torque like blower, water pump and etc., the power ratings of applicable motor can be one grade higher. See inverter’s nameplate for details.

EM303B Outlook

Overall and Installation Dimensions

EM303B can be classified to 10 sizes for total 30 models.

The keypad can be installed on the metal panel separately with a hole size of 116.5±0.1(L)*71.5±0.1 (W)mm, and applicable metal panel thickness:1.2~2.0mm.

Overall Installation Dimensions of EM303B

Flush Mounting

EM303B-090,EM303B-110~132,EM303B-160~200 can be installed in flush mounting. The mounting method:
Please move the flanges on the top and bottom of the housing from the place as shown below. It only needs to unscrew the boltsof flanges and assemble at the right places. See Figure 2-8 for the installation dimensions.