ABB REM615 HCMJAEADABC2BNN11E Motor protection and control

ABB REM615 HCMJAEADABC2BNN11E Motor protection and control

INTRODUCTION

REM615 is a dedicated motor IED perfectly aligned for the protection, control, measurement and supervision of asynchronous motors in manufacturing and process industry. REM615 is a member of ABB’s Relion® protection and control product family and its 615 series. The 615 series IEDs are characterized by their compactness and withdrawable-unit design. Re-engineered from the ground up, the new 615 series has been designed to unleash the full potential of the IEC 61850 standard for communication and interoperability between substation automation devices.

Application

REM615 constitutes main protection for asynchronous motors and their drives in manufacturing and process industry. REM615 is available in three standard configurations. Typically, the motor IED is used with circuit-breaker or contactor controlled HV motors, and contactor controlled medium sized and large LV motors in a variety of drives, including both continuously and intermittently operated asynchronous motor drives with varying load.

Protection and control

REM615 offers all the functionality needed to manage motor starts and normal operation also including protection and fault clearance in drive and network disturbance situations. The main features of the motor IED include thermal overload protection, motor start-up time supervision, locked rotor protection and protection against too frequent motor starts. The IED also incorporates non-directional earth-fault protection, negative phase sequence current unbalance protection and backup overcurrent protection. Furthermore, the IED offers motor running stall protection, loss-of-load supervision and phase-reversal protection.

Standard configurations B and C additionally offer directional earth-fault protection, three phase undervoltage protection, negative phase sequence overvoltage and positive sequence undervoltage protection. Further, the B and C configurations offer frequency protection including overfrequency, underfrequency and rate-of-change frequency protection modes.

The motor IED has been thoroughly adapted for earth-fault protection. Using cable current transformer sensitive and reliable earth-fault protection can be achieved. Phase current transformers in Holmgreen (summation) connection can also be used for earth-fault protection. In this case possible unwanted operations of the earth-fault protection due to CT saturation at motor start-up can be prevented using the IED’s internal interlocking features or suitable stabilizing resistor in the common neutral return.

Standardized communication

REM615 features genuine support for the new IEC 61850 standard for communication in substations and also for Parallel Redundancy Protocol (PRP) and High-availability Seamless Redundancy (HSR) protocols. The IED also supports DNP3, IEC 60870-5-103 and Modbus® protocols.

For a redundant Ethernet solution the IED offers an optional fibre-optic communication module providing two optical and one galvanic Ethernet network interfaces. Alternatively, the IED features an optional galvanic communication module with two galvanic and one optical Ethernet network interfaces or three galvanic interfaces. The third Ethernet interface provides connectivity of any other Ethernet devices to an IEC 61850 station bus inside of a switchgear bay. The redundant Ethernet solution can be built on the Ethernet based IEC 61850, Modbus® and DNP3 protocols.

The implementation of the IEC 61850 substation communication standard in REM615 covers both vertical and horizontal communication, including GOOSE messaging with binary and analog signals and parameter setting according to IEC 61850-8-1. The substation configuration language enables the use of engineering tools for efficient configuration and commissioning of substation devices. For accurate time stamping REM615 supports synchronization over Ethernet using SNTP or over a separate bus using IRIG-B.

Preventive condition monitoring

For continuous control of its operational availability REM615 features a comprehensive set of monitoring functions to supervise the IED itself, the CB trip circuit, the current circuit, fuses and the circuit breaker. The IED monitors the wear and tear of the circuit breaker, the spring charging time of the CB operating mechanism and the gas pressure of the breaker chambers. The IED also supervises the breaker travel time and the number of CB operations to provide basic information for scheduling CB maintenance. Furthermore, REM615 incorporates a motor runtime counter facilitating maintenance scheduling of motors.

Single line diagram

The 615 series IEDs with large graphical display offer customizable visual single line mimic diagrams (SLD) with position indication for the relevant circuit breaker, disconnectors and the earthing switch. Apart from the default single line diagram, the IED may display related measured values, as provided by the chosen standard configuration. The SLD view can also be accessed through the web-browser based user interface. The default SLD can be modified according to user requirements using the graphical display editor of PCM600.