EL-FI DLM Motor Load Monitor

Emotron's ElFi DLM is a digital load monitor that directly measures the load on an asynchronous motor by using the motor itself as a sensor. By using Emotron's VIP method of calculating the motor's shaft power, the DLM is able to discount the losses of the motor and monitor the working load only. This is extremely important if meaningful protection is to be provided.

By measuring shaft power, the DLM can determine the working load exerted by the equipment on the motor. Typical applications involve a conveyor, stone crusher, pump, fan, lifting device and most other equipment driven by asynchronous motor.

The DLM "Auto Set" feature ensures operational simplicity. On pressing the Auto Set, the DLM will automatically measure the working load, determine the correct protection parameters and set them -all within 3 seconds. Among the various abnormal conditions the DLM can detect, as either a motor overload or underload, are jamming, belt and chain breakage, dry running, pump cavitation and seized bearings

Programmable functions are accessible via the key pad and LCD window. Functions are set using a menu-driven command structure and include motor start delay timer, alarm functionality and protection of set parameters.

Other standard features include phase current and phase voltage measurement, each of which is displayed on the LCD.

If required, the El-Fi DLM can be supplied with factory-fitted accessories, such as load representative analogue outputs of 1-10V, 0-5V or 4-20mA, 0-20mA.

Benefits

Auto Set
Auto Set Measures the actual load during three seconds and then automatically sets the alarm level for the main alarm and pre-alarm.

Three Monitors in One
Overload Monitor (Max alarm with pre-alarm) Underload Monitor (Min alarm with pre-alarm) Over and Underload Monitor (Max- and Min alarm)

Pre-alarm
Provides an alarm before the main alarm activates, thereby preventing unnecessary process interruption.

Connection
Quick and easy connection with minimal wiring. The motor is used as the sensor.

Protection
Protects the motor-driven equipment or process

Alarms
An alarm is triggered by over- or underloading of, e.g. conveyor systems, cranes/lifting devices, agitators, scrapers, drilling/milling/grinding machines, compressors, stone grinding/crushing machines, saws, pumps, dry running, cavitation, fans etc.

Emotron Inc., 3440 Granite Circle, Toledo, OH 43617. Tel: 419-841-7774; Fax: 419-843-5816.