Basler Electric 9170818100 Generator Differential Relay
The Basler Electric 9170818100 is a high‑speed differential relay specifically designed for generator protection. It compares the currents entering and leaving the generator windings to detect internal phase‑to‑phase or phase‑to‑ground faults. The relay operates on the principle of current balance, tripping instantly when a difference exceeds the set threshold, indicating a fault within the protected zone.
This relay is crucial for large synchronous generators, providing primary protection against damaging short‑circuits. It features adjustable pickup settings, a stabilising resistor to prevent maloperation during external faults, and fast operating time to minimise damage.
Key Features
Instantaneous differential protection
Adjustable pickup: 10–50% of rated current
Stabilising resistor for through‑fault stability
High speed operation: < 30 ms
Low burden current transformers
Target and seal‑in relay for trip indication
Technical Specifications
Input: 1A or 5A CT secondary; pickup range: 0.1–2 A; stabilising resistor: up to 1000 Ω; operating time: < 30 ms at 2x pickup; output contacts: 2 x SPDT, 5 A; operating temperature: -10°C to +55°C.
Applications
Used in generator protection panels for synchronous machines of all sizes. The relay is also applicable to large motors and transformer differential protection with appropriate settings.
Installation and Calibration
Mount the relay in a standard panel. Connect the CTs from both the neutral and line sides of the generator. Set the pickup current and adjust the stabilising resistor according to the generator’s parameters. The relay includes test points for verification.
Reliability and Maintenance
The solid‑state design provides high reliability and long service life. Periodic testing of the relay and CT circuits is recommended to ensure proper operation. The relay is immune to harmonic distortion and DC offsets.
Why Choose the 9170818100?
This differential relay offers reliable and fast protection for generators, backed by Basler Electric’s expertise. Its simple design and easy setting make it a popular choice for both new and retrofit installations.
In conclusion, the Basler Electric 9170818100 generator differential relay is an essential device for safeguarding generators against internal faults, ensuring system stability and equipment longevity.
