Relé de monitoreo de suministro multifunción trifásico Schneider RM17TA00

(Secuencia de fases / Pérdida de fase / 3-Phase Voltage Unbalance)

Serie: Control Zelio / Harmony RM17T Series, Montado en carril DIN 3-phase monitoring relay, commonly known as phase sequence protector.

✅ Funciones de seguimiento

Phase sequence detection (L1-L2-L3): Instant trip upon reverse phase sequence

Phase loss detection: Instant trip if any phase is lost (including phase loss with regenerated voltage from motors)

3-phase voltage asymmetry (desequilibrar): Adjustable threshold from 5% a 15% of Un, with time-delayed tripping

Logic rule: inversión de fase / phase loss → instantaneous trip; voltage unbalance → delayed trip.

📌 Especificaciones eléctricas clave

Rango de voltaje de monitoreo: AC 208～480V (operating limit: 183～528V AC)

Frecuencia: 50/60 Hz (±10%)

Output contact: 1 CO (SPDT), 5A / 250VACACIONES

Time delay adjustment: 0.1~10s (only for unbalance faults)

Reset delay: Aprox.. 1.5s

Consumo de energía: ≤22VA @ 400V 50Hz

Montaje: DIN 35mm rail; ancho 17,5 mm (1 ancho del módulo)

Indicación: Status LED; sealed transparent cover prevents accidental parameter changes

🧮 RM17T Series Selection Comparison (Key for Model Selection)

RM17TT00: Secuencia de fases + pérdida de fase (NO unbalance monitoring)

RM17TA00 (Modelo actual): Secuencia de fases + pérdida de fase + 3-phase voltage asymmetry

RM17TU00: Secuencia de fases + pérdida de fase + subtensión

RM17TE00: Secuencia de fases + pérdida de fase + asymmetry + sobretensión + subtensión (full-function model)

🛠️ Escenarios de aplicación típicos

Ascensores, hoisting & conveying equipment, compresores de aire, bombas de agua, unidades de refrigeración, maquinaria de embalaje; prevents motor reverse rotation, burnout from phase loss, and overheating caused by three-phase unbalance.

🔌 Wiring Guidelines

1. Connect L1/L2/L3 directly to the monitored three-phase supply (autoalimentado, no separate auxiliary supply required).
2. Terminales 15/16/18 form one changeover contact: 15-16 = normally closed; 15-18 = normally open.
3. Panel setting: First select rated voltage (208/220/380/400/415/480V), then set unbalance threshold and fault delay time.
4. Fault recovery: Automatic reset once power returns to normal; no manual reset button.

⚠️ Solución de problemas

Relay does not energize after power-up: Check phase sequence, pérdida de fase, and voltage range dip switch setting.

Frequent tripping during normal operation: Increase unbalance percentage threshold, extend time delay, and investigate single-phase load current imbalance.

No LED illumination: Three-phase input voltage exceeds the 183~528V operating range.

📎 Replacement Options

Direct upgraded replacement within the same product line: RM22TA33 (RM22 series, same functions with 2 C/O contacts).

Alternativas domésticas: chint / Delixi three-phase phase-sequence & unbalance monitoring relays.

1. Full Model List of RM17T Series

(3-phase supply monitoring relays, 17.5mm single-module width, Montaje en carril DIN)

1) Modelo Básico: RM17TG (Solo secuencia de fases + pérdida de fase; sin desequilibrio / monitoreo de subtensión)

RM17TG00: 1 C/O changeover contact, 208~480 VCA

RM17TG20: 2 Contactos de conmutación duales C/O, 208～440V AC

2) Multifunction Models (RM17TT / FRENTE A / TU / EL, 208~480 VCA, 1 C/O contact uniformly)

Abbreviation explanation:

TU = T + Subtensión

TE = T + Everything (funciones completas)

III. Common Specifications for the Whole Series (All Models Identical)

Rango de voltaje: AC 208～480V (operating limit 183～528V)

Calificación de contacto: 5A / 250VACACIONES; RM17TG00/TT/TA/TU/TE = 1 CO; only RM17TG20 = 2 CO

Ancho: 17.5milímetros (1P module)

Modo de reinicio: Automatic reset after fault clears; no manual reset button

1. Upgraded Replacement Models (RM22 Series with Extra Contacts)

RM17TA00 → RM22TA33 (2 C/O contacts)

RM17TU00 → RM22TU23

RM17TE00 → RM22TE33

RM17TA00 Overall Dimensions (Ancho × Alto × Fondo)

17.5 milímetros × 90 milímetros × 72 milímetros

Ancho: 17.5 milímetros (1-pole module, same width as 1P MCB)

Altura: 90 milímetros

Profundidad (from DIN rail front face): 72 milímetros

Montaje: DIN35 standard rail

Peso neto: Aprox.. 0.13 kilos

✅ All models in RM17T series (RM17TT00 / RM17TU00 / RM17TE00 / RM17TG00) share identical dimensions.

Core Positioning of RM17TA00

It provides phase sequence + pérdida de fase + three-phase voltage unbalance protection, mainly for three-phase asynchronous motors. It prevents reverse rotation, motor burnout from phase loss, and overheating caused by long-term voltage imbalance. Autoalimentado, compact 1-module DIN rail design, ideal for compact control cabinets and retrofitting projects where no PLC signal collection is needed.

1. Industria & Equipment Applications
2. Izar & Transmitir (Aplicación primaria)

Puentes grúa, electric hoists, cintas transportadoras, apiladores, ascensores; prevents motor reverse rotation after phase reconnection and overheating damage to gearboxes and motors due to long-term unbalance.

2. Ascensores & Plataformas elevadoras

Freight elevators, simple lifting platforms, parking lift power circuits; wrong phase sequence causes reverse car movement; voltage unbalance leads to excessive temperature rise of traction motors.

3. Bombas de agua & Estaciones de bombeo

High-power centrifugal pumps, submersible sewage pumps, pre-power monitoring before variable-frequency drives; unbalance is frequently caused by mixed single-phase loads in water supply, sewage treatment and chiller pump systems.

4. Compresores de aire & HVAC Refrigeration Units

Compresores de aire de tornillo, enfriadores de agua, air-source heat pumps, compresores de refrigeración; compressors are highly sensitive to three-phase unbalance, which easily burns out motor windings.

5. Embalaje, Textil & Automatización de la carpintería

Líneas de envasado, maquinaria textil, extrusoras, equipo auxiliar de moldeo por inyección; frequent power maintenance and phase swapping require phase sequence verification before power-on.

6. Fan Loads

Extractores de aire, ventiladores de tiro inducido, drying fans; large inertia fans produce regenerated voltage after phase loss; this model supports phase loss detection under regenerated voltage conditions.

7. Control Panels & Coincidencia de equipos OEM

380V three-phase control cabinets, non-standard automation OEM factory-fitted protection; old equipment retrofits, hard-contact interlock without adding PLC analog modules.

1. Límite de selección: Adecuado / Escenarios inadecuados

✅ Recomendado:

Three-phase motor loads with risks of voltage asymmetry overheating (core advantage over RM17TT00)

Supply voltage AC 208~480V, 50/60Hz

Espacio limitado en el gabinete, solo 1 module width available

Hard-contact interlock directly wired into main contactor coil circuit

❌ No recomendado:

Sobretensión + undervoltage monitoring required → choose RM17TE00

Only undervoltage protection without unbalance → choose RM17TU00

Dual independent alarm contacts required → upgrade to RM22TA33 (2CO)

Motors behind variable-frequency drives: VFDs already have built-in phase loss & protección de desequilibrio; extra relay is generally unnecessary.

III. Typical Control Logic

Contact wired in series with the main contactor coil circuit:

Normal power supply → relay energizes and closes, contactor power permitted;

inversión de fase / pérdida de fase / voltage unbalance detected → relay de-energizes and opens, cutting off main power, with dry contacts available for PLC or audible-visual alarm signals.