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

H: Harsh environment (conformal coating; 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: ≤10 VA typical

Protection & Timing

Protection Functions: Overload (thermal memory), short circuit, ground fault (high‑Z), stall, undervoltage/overvoltage, phase loss/reversal, RTD overtemperature, mechanical jam, torque protection

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, burden >500 kΩ

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 (stator thermal protection)

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

Display & User Interface

Display: Backlit LCD (standard size)

Indicators: 10 LED status (RUN, TRIP, ALARM, FAULT, SERVICE, etc.)

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 +70°C

Storage Temp: -40°C to +85°C

Humidity: 5–95% non‑condensing

Conformal Coating: Yes (protection against dust, moisture, chemicals)

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/mechanical faults (jam, torque) to prevent damage。

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

Harsh Environment Reliability: Conformal coating for chemical, moisture, and dust resistance。

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

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

Applications

Oil & Gas: Offshore/onshore pumps, compressors, fans (high humidity/corrosion)

Chemical/Petrochemical: Corrosive process areas, aggressive environments

Metallurgy: Steel mills, heavy‑duty process motors (dust/vibration)

Water Treatment: Coastal/industrial wastewater (moisture/salt)

Mining: Mineral processing motors (dust/humidity)

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; conformal coating requires no routine maintenance.