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Single-phase CM-SRN current monitor allows the manual selection of the desired protection function. It is able to detect undercurrents and, depending on the model, overcurrents. For some versions a response delay time can be adjusted by the user in addition to the threshold value and the hysteresis.

The voltage monitor CM-ESN monitors the applied single-phase voltage. Measuring range selection is performed via The Terminals B1, B2 or B3 & C. Depending on the selected mode of operation the output relay is energized if the monitored voltage exceeds or falls below a threshold. The switching status of the 1-phase CM-ESS relay as well as the presence of the supply voltage is indicated on the device by LEDs.

If you are looking for ABB Monitoring Relays, please call us on (800) 894 - 0412 or email us at info@clrwtr.com we will do our best to help you find the ABB Measuring Relays that you are looking for at the most competitive prices possible. If you are searching for ABB Motor Load Monitors technical information (data-sheets) please use the datasheets or product selection guide page links.

The three-phase monitoring relay CM-PFS is able to detect an incorrect phase sequence in three-phase networks. As long as the phase sequence is correct, the relay remains energized and the yellow LED is on. The relay is de-energized if it detects a fault. In case of motors which continue running with only two phases, the CM-PFS detects phase sequence faults if the reverse fed voltage is not higher than 60 % of the original voltage.

CM-MPS multifunctional three-phase monitor is able to monitor all phase parameters, such as over and undervoltage, phase sequence, phase loss and phase unbalance. The thresholds for over and undervoltage and phase unbalance can be adjusted as well as a trip time delay which allows short-term suppression of fault signals.

Insulation monitors of the type CM-IWN-AC are able to detect occurring first isolation faults within ungrounded AC systems. Its measuring principle is based on a monitoring of the resistance against earth potential. First, DC voltage is superimposed on the system. Now, an earth-leakage fault can be simulated by pressing the "Test" button.

CM-IWN-DC is able to monitor DC systems for isolation faults. Earth-leakage monitoring is performed separately for L+ and L- by means of separate evaluation of the insulation resistance. The threshold, the insulation resistance must not fall below, has to be adjusted manually. An occurring fault is indicated by an LED. Fault tripping can also be stored.

The CM-LWN is able to monitor the load condition of inductive loads. This is achieved by determining the value cos Phi. A value towards 0 indicates low load. A cos Phi value towards 1 indicates high load. The permitted range of cos Phi (i.e. the permitted motor load) is manually adjusted by means of thresholds. If the load is above or below the permitted range, the corresponding relay is deenergized and the fault signal is indicated by an LED.

The relay is energized again if cos Phi comes back within the acceptable limits, taking into account the release hysteresis. In this case the LED flashes permanently and can be switched off by pressing the reset button. The CM-LWN allows the adjustment of two further values: The suppression time can be used to suppress fault signaling during motor starting and the response delay time can be used to suppress fault signaling due to unavoidable short-time load changes during normal operation.

UMC100-FBP is a flexible, modular and expandable motor management system for constant-speed low-voltage range motors. It's most important tasks include motor protection, prevention of plant standstills and the reduction of down time. This is made possible by early information relating to possible motor problems which avoids unplanned plant standstills. Even if a motor trips, quick diagnosis of the cause of the fault serves to reduce downtime. UMC100-FBP combines in a very compact unit:

• Motor protection
• Motor control
• Motor diagnostics
• Communication

The PTC sensors are incorporated in the windings of the motor and connected to the CM-MSS. If one of these PTC resistors heats higher than permitted, the motor has run too hot. The output relay drops off and this signal can be further processed by a control instance to initiate corresponding fault recovery. As soon as the motor has cooled down, the relay is energized again, if the autoreset function is configured or if the switching command is externally applied via the control inputs (remote reset).

The temperature monitoring relay C512 can be used for temperature monitoring of solid, liquid and gaseous media. Temperature acquisition is performed using special resistive sensors with a known temperature dependent resistive behavior. These sensors are inserted directly into the media to be monitored and connected to the relay C512. The evaluation of the measured quantity and the adjustment of measuring parameters is performed digitally.

First, the used sensor type, e.g. PTC sensor PT100, is selected with the device. On the temperature monitoring relay C512 the thresholds for the permissible temperatures can be adjusted as lower or upper threshold or as a range. Depending on the exceeded threshold output relay K1 or output relay K2 changes its switching state. With this, the status of each sensor is displayed in order to indicate which resistive sensor has exceeded or fallen below the permissible temperature. The wide range of functionality of this device is completed by a fault diagnosis.

CM-ENE-MIN is used to monitor minimum liquid levels. The MIN electrode and a ground reference electrode C are immersed into the conductive liquid. As a result, the output relay is energized. The output relay is deenergized as soon as the level reaches the point where the adjusted resistance is measured, i.e. where the MIN electrode becomes dry.

Using CM-ENS liquid level monitor the liquid level can be maintained within a specific range, limited by a maximum level and a minimum level. Using two measuring electrodes (MIN and MAX) and one reference electrode C the resistive change at different liquid levels can be acquired. First, the output relay is de-energized. It energizes if the maximum permitted liquid level is exceeded. It de-energizes again if the level falls below the minimum permitted liquid level.

CM-KRN contact protection relay is used to protect sensitive contacts and to remove load from these contacts as well as for switching amplification purposes. The output relay is energized if the contact to be protected is closed for at least 20 ms. The switch position can be stored. Furthermore, a response delay can be adjusted to bridge contact bouncing. The relay can be operated via 3-wire proximity sensors for switching of higher power.

The CM-SIS is used to supply 2 or 3-wire NPN and PNP sensors with power and to evaluate their switching signals. Up to two sensors can be connected simultaneously and supplied with 24 V DC. The relay is energized depending on the input current of the PNP or NPN transition. If the switch-on current threshold is exceeded, the corresponding LED lights up and the relay of the sensor circuit is energized.

The cycle monitoring relay CM-WDS (watchdog) observes if a regularly intermittent pulse is applied to its pulse input "I". It is, for example, possible to connect the output of a programmable logic controller (plc), which is set and reset regularly (e. g. once each cycle). The connected cycle pulse must be generated by suitable programming of the plc/ipc. Now, the CM-WDS monitors if the cycle time of the plc/ipc program is smaller than the cycle monitoring time setted by means of the front-face selector switch "time value (ms)".

The output relay 11-12/14 of the CM-WDS energizes and the red LED is switched off, if there are minimum 8 successive regular pulses on input "I". When the pulse signal stays out or is not regular, the output relay de-energizes and the red LED is illuminated.

Plug-in Current Transformers CM-CT

• Without primary conductor though with foot angle, insulating protective cap and bar fastening screws
• Primary / rated current from 50 A to 600 A
• Secondary current of 1 A or 5 A
• Class 1

Our industrial factory automation supplies distributors warehouse in Boise, Idaho USA stocks some ABB measuring relay products enabling us to further assist you in finding the correct insulation monitoring relay in the USA, Canada and Mexico. Whether we have motor load monitoring relay in stock in Boise, Idaho USA or need to get them from ABB Low Voltage Controls; Clearwater Tech can get thermistor motor protection relay to you fast and save you some money! It will be very helpful if you have the temperature monitoring relay part numbers ready, then our sales representatives can provide you with a pricing and availability quote for liquid level monitoring relay that you are looking for in seconds. If you do not have the part numbers for contact protection relay, our application engineers will be able to help you figure out the part numbers and get the price quote to you as soon as possible.