Functional block diagram of the S16/MDT relay
General presentation
The S16/MDT relay is dedicated to the protection of small and medium power asynchronous motors. This relay is fitted with two current units allowing the measurement of the three-phase currents and of the residual current, and with a single-phase voltage unit for the measurement of the residual voltage.
The devices of the SMARTLINE range, S16 series, are designed to provide compact, economical and simple solutions for feeder protection, motor protection and various types of back-up protection. These devices feature a predefined hardware layout and fixed standard configurations.
The relay is fitted with a USB 2.0 port at the front and a serial interface at the rear. The front port gives access to the device configuration, which the user can modify (thresholds, time delays, signalling, tripping matrix, etc.) using the S16 Tool software, available for free download on our website. The communication port at the rear of the device is reserved for the connection to the SCADA system (IEC 61-870).
General features
- Compact housing (16TE)
- Secondary rated current 1 A/5 A, user-configurable (phase and earth)
- Secondary rated voltage 100/110 Vac
- Universal power supply (19.2 – 300 VDC; 80 – 255 VAC)
- Event recorder able to store up to 1,000 events
- Free and user-friendly software (S16 Tools)
- High-speed and supervised tripping (TRIP) contacts
- Watchdog
- Several mounting methods: flush-mounted; semi-flush-mounted; DIN rail
- Software-configurable rated voltage of the logic inputs
- Ready to use and simple to operate
- Supported communication protocols:
- IEC 60870-5-101
- IEC 60870-5-103
- 128 × 64 black and white LCD display with white backlight
- 4 push buttons
- 8 alarm LEDs programmable in a three-colour matrix
- Three-colour status LED
Applications
The S16/MDT relay is specially designed to protect asynchronous motors.
The relay has 4 current inputs and one voltage input for the measurement of the residual voltage.
Despite its compact size, this intelligent electronic device (IED) offers a wide range of protection functions based on current measurements: non-directional overcurrent and directional earth fault protection (stator earth), thermal overload protection, phase loss and circuit breaker failure protection, as well as phase sequence reversal protection.
For motor applications, it has a start-up supervision function with restart inhibition, protection against frequent starts and undercurrent protection.
Protection and control functions
- Three-phase overcurrent protection
- Directional earth fault protection (stator earth).
- Monitoring of the motor heating by thermal image, based on the symmetrical components (positive and negative sequence) or on the temperature measurement by PTC probes
- Inrush current detection
- Current unbalance
- Fuse failure
- The relay protects motors during the starting phase and in operation.
- Excessively long start-up
- Number of starts
- Locked rotor
- Circuit breaker failure protection
- No-load running
Click on the link to download the general documentation : Please contact our Sales Department
Click on the link to download the operation manual : Please contact our Sales Department
Click on the link to access the technical documentation to attach to your order : DOCACOM_S16
