Product Overview

The GE Multilin 469-P5-HI-A20-E-H​ is a microprocessor-based motor management relay from GE’s Multilin 469 series, built to protect, control and monitor medium and large horsepower three-phase motors and the equipment they drive. It belongs to the SR family of relays and comes in the industry-standard draw-out arrangement, in which a removable relay unit mates with a fixed case that carries the permanent field wiring and provides automatic CT shorting so the unit can be withdrawn from an energised panel safely. The 469-P5-HI-A20-E-H​ reads every element of its order code precisely: 469 is the base platform, P5 specifies 5 A phase CT secondaries, HI is the wide-range control power supply covering 90–300 V DC and 70–265 V AC at 48–62 Hz, A20 provides four 4–20 mA analogue outputs, E is the enhanced display with the larger LCD, and H is the harsh-environment conformal coating for chemically corrosive or humid locations.Functionally, the GE Multilin 469-P5-HI-A20-E-H​ combines protection, metering, control and diagnostics in a single device. Its central element is an advanced thermal model that retains thermal memory in a thermal capacity used register updated every tenth of a second, biased by measured negative-sequence current and by up to twelve RTD inputs, with separate cooling time constants for running and stopped states. Around that core sit the full electrical protection set: thermal overload, phase and ground overcurrent, stator differential, current unbalance and single-phasing, mechanical jam, undervoltage, overvoltage, underfrequency, reverse power and underpower, plus the voltage-dependent overload curve that makes the platform suitable for high-inertia starts where acceleration time exceeds safe stall time.What separates the 469-P5-HI-A20-E-H​ from a simple overload relay is its diagnostic depth. It records time-stamped events, captures oscillography for post-trip analysis, trends operating data, and logs learned starting characteristics, so that a trip becomes an explained event rather than a mystery. Configuration is handled through EnerVista 469 with the Motor Settings Auto-Configurator, and the enhanced display option fitted here means an operator can read trip cause, actual values and setpoints locally without a laptop.

Technical Specifications

Main Features and Advantages

Draw-out construction that protects the outage, not just the motor: The GE Multilin 469-P5-HI-A20-E-H​ sits in a fixed case with automatic CT shorting, so the relay unit can be withdrawn or replaced on an energised panel without opening the CT circuit. Any 469 unit fits any 469 case, which means a failed relay becomes a five-minute swap rather than a rewiring job. The sealable draw-out handle and setpoint access passcode also prevent unauthorised removal or setting changes, which matters in shared switchgear rooms.A thermal model built for real duty cycles: Rather than applying a fixed curve, the 469-P5-HI-A20-E-H​ maintains continuous thermal capacity memory biased by negative-sequence current and by up to twelve RTD measurements, using separate cooling constants for running and stopped conditions. Start inhibit blocks a restart until the machine has genuinely cooled, while emergency restart remains available when the process justifies it. The voltage-dependent overload curve is the feature that makes the platform viable on high-inertia drives, where the acceleration time would otherwise exceed the safe stall time and cause nuisance trips on a conventional curve.Twelve RTD inputs covering the whole machine: With twelve individually programmable RTD channels, the 469-P5-HI-A20-E-H​ can watch stator windings, both bearings, ambient air and driven-equipment temperatures simultaneously, each with alarm, high-alarm and trip thresholds and with open and shorted sensor detection. Temperature is not merely displayed — it biases the thermal model, so protection tightens as the machine gets hot and relaxes when cooling is effective.Diagnostics that turn a trip into an answer: Time-stamped event records, waveform capture and trending mean that after a trip the question “why” has a documented answer. The relay also tracks learned starting characteristics over time, so a gradually lengthening acceleration or a rising starting current shows up as a trend before it becomes a failure — the single most useful signal for planning maintenance on a critical motor.Conformal coating for hostile atmospheres: The H suffix on the 469-P5-HI-A20-E-H​ adds conformal coating to the boards, which is the right specification for chemical plants, pulp and paper mills, coastal and offshore installations, and any location where humidity or corrosive vapour would otherwise shorten the life of the electronics.