Motor protection

The motor bay as a complete application

Industrial motors are critical assets in process plants, mines, cement plants, refineries, marine and offshore installations, water utilities and infrastructure. Motor failure impacts process continuity, safety and operating cost, so motor protection covers not only overcurrent and thermal functions, but also breaker or contactor control, interlocking, diagnostics and SCADA/DCS integration.

The SYMAP^® platform unifies protection, control, measurement, monitoring, communication and diagnostics of the motor bay in one device. Configuration is defined by motor type, starting method, required CT/VT inputs, RTD and analog diagnostics, the number of digital and relay signals, and monitoring requirements.

One platform, configuration matched to the application

SYMAP^® features a broad base functional package matched to the motor application. In SYMAP^® Compact+, the configuration covers hardware options (CT/VT, Ig, DI/DO, communication modules) and software/application options in the Order Code; advanced functions such as 87M differential, distance 21 or specific communication options are selected as separate items. In the classic SYMAP^® series (Y/BC/M), the available functions follow from the selected hardware and variant build.

When a function is available in the selected configuration, the user can use it concurrently with the other available functions, no limits on the number of active protections, no protection "points", no licensing of simultaneous use.

It is enough to describe the motor bay and the required signals, we propose a suitable SYMAP^® configuration covering hardware, variant and options.

Typical motor applications

Six common scenarios where SYMAP^® motor protection is applied.

Pumps

Water-utility, process and cooling pumps. Protection against overload, locked rotor, loss of load (cavitation, dry running), bearing temperature monitoring.

Fans

Industrial fans with high moment of inertia. Heavy starting, long acceleration time, thermal stress during restart, dedicated start limit counter.

Compressors

Reciprocating and screw air and gas compressors. Start/stop logic, protection against too-frequent starts, pressure and temperature monitoring.

Mills and crushers

Cement plants, mining, mineral processing. High starting torque, locked-rotor risk, long thermal stress, advanced thermal model.

Conveyors

Belt, roller and screw conveyor lines. Underload, jamming, interlocking with adjacent drives and process steps.

Marine and auxiliaries

Thrusters, winches, oil pumps, fans, compressors on vessels and offshore platforms. Local and remote control via ship SCADA, IEC 61850 GOOSE.

Compact+ or classic SYMAP^®?

Classic SYMAP^® Y-M covers most motor applications with advanced thermal model, restart inhibit logic and locked rotor protection. SYMAP^® Compact+ (+F1/+F2/+F3) is the right choice for compact motor bays requiring integrated contactor or breaker control, interlocking and SCADA/DCS integration.

Products covering the motor application

Need detailed technical specifications?

For exact protection function coverage, settings ranges, ANSI device numbers, CT/VT specifications, communication protocols and configuration support, contact our team to receive the relevant datasheet and engineering proposal.

Request datasheet Engineering inquiry