Megger MLLF Low Level Filter

Megger mllf low level filter

The Megger MLLF accessory allows current channels* to provide high-accuracy low-level voltage outputs to simulate Rogowski sensors used by some relays.  The MLLF also allows voltage channels* to provide high-accuracy low-level voltage channels to simulate voltage dividers that are typically used for voltage measurement in conjunction with Rogowski sensors.  The MLLF allows the test set to use existing RTMS software tools to test relays using Rogowski inputs.

The connections from Rogowski sensors and voltage dividers are typically connected via shielded cables directly from the sensor to the protective relay.  Therefore, there are no terminal block connections. Megger offers Relay manufacturer-specific cables with proper wiring and terminations to directly connect from the MLLF to the protective relay.

When using the MLLF, relay testing screens in RTMS* such as Ramping, Timing, Sequencer, and others are functional to make testing of relays with these types of inputs very user-friendly.

Megger mllf low-level filter specification:

Specifications are subject to change without notice. Accuracies are specified from 10 to 100 % of range, 25°C ± 5°C, 50-60 Hz.

Environment

Application field: For use in high-voltage substations and industrial environments

• Temperature Operating:0°C to 50°C (32°F to +122°F)
• Storage & transport:-25°C to +70°C (-13°F to +158°F)
• Humidity:5% – 90% RH, non-condensing
• Altitude (operational):3000 m. Full duty cycle: 2000 m.

CE-marking

• LVD: EN/IEC 61010-1:2001 (2nd Edition)

Conformance Standards

• Safety: EN 61010-1, UL 61010-1, CSA- C22.2 #61010-1
• Shock: EN/IEC 60068-2-27
• Vibration: EN/IEC 68-2-6
• Transit Drop: ISTA 1A
• Free Fall: EN/IEC 60068-2-32
• Drop / Topple: EN/IEC 60068-2-31
• EMC Emissions:EN 61326-2-1, EN 61000-3-2/3 FCC Subpart B of Part15 Class A
• Immunity: EN 61000-4-2/3/4/5/6/8/11
• Weight:1lb. (0.45kg) each