Model Interpretation

SR469: 469 series motor management relay (draw‑out, modular platform)

P5: 5 A CT secondary phase current input

HI: High‑impedance wide‑range control power (70–265 VAC / 90–300 VDC)

A20: 4 isolated 4–20 mA analog outputs

E: Enhanced front panel (larger LCD, no Ethernet)

Technical Parameters

Input & Power

CT Input: 5 A phase (5 channels); 2 ground CT inputs

VT Input: 0–690 V (delta/wye configurable)

Control Power: 70–265 VAC / 90–300 VDC, 48–62 Hz

Power Consumption: 5–15 W typical

Protection & Timing

Protection Functions: Overload (thermal memory), short circuit, ground fault, stall, undervoltage/overvoltage, phase loss/reversal, RTD overtemperature

Overcurrent Curves: IEC 60255‑3 inverse / definite time, 0.1–10×In

Trip Time: ≤10 ms (instantaneous); ±50 ms accuracy

I/O & Interfaces

Analog Outputs: 4 × 4–20 mA, isolated

Digital Inputs: 9 opto‑isolated (dry/wet contact, ≤1 ms response)

Relay Outputs: 6 Form C (5 A / 250 VAC)

RTD Inputs: 3‑wire; 100Ω Pt, 100/120Ω Ni, 10Ω Cu

Communication: RS‑232 (front, programming), RS‑485 (Modbus RTU); no Ethernet

Display & User Interface

Display: Enhanced 40‑character backlit LCD

Indicators: LED status (RUN, TRIP, ALARM, FAULT)

Keypad: Numeric/navigation for local programming

Mechanical & Environmental

Dimensions: 177.5 mm H × 128.5 mm W × 119 mm D

Mounting: DIN rail or panel mount

Enclosure: Flame‑retardant plastic; IP50 (front), IP20 (overall)

Operating Temp: -40°C to +60°C

Storage Temp: -40°C to +85°C

Humidity: 5–95% non‑condensing

Certifications: UL, CE, CSA, ATEX, IEC 60255

Metering & Diagnostics

Metering: 3‑phase current/voltage, power, energy, frequency, PF, demand

Diagnostics: Event log (512 events), fault recorder, oscillography, pre‑trip data

Thermal Modeling: RTD biasing, cooling time constants, start inhibit

Core Functions

Comprehensive Motor Protection: Detects electrical/thermal faults to prevent damage and downtime.

Precision Monitoring: Real‑time tracking of electrical parameters and winding temperature via RTDs.

Flexible Control: Configurable start/stop logic, overload curves, and fault responses.

SCADA Integration: Modbus RTU over RS‑485 for remote monitoring/control.

Enhanced Local Operation: Larger LCD for clear diagnostics and programming.

Applications

Oil & Gas: Pumps, compressors, fans (medium‑voltage)

Power Utilities: Plant auxiliaries, substation motors

Metallurgy: Steel mills, heavy‑duty process motors

Chemical/Petrochemical: Critical process motor protection

Water Treatment: Pumps, blowers in municipal/industrial facilities

Usage & Maintenance

Installation: Mount on DIN rail/panel; wire CT/VT, control power, RTDs, and communications.

Programming: Use front keypad or connect to EnerVista 469 software via RS‑232.

Configuration: Set CT/VT ratios, protection curves, RTD types, and I/O mapping.

Maintenance: Inspect terminals annually; update firmware periodically; verify settings after system changes.