NewTrend · WiFi smart energy meter and protector
Product overview
The OVA-63T combines a single-phase energy meter, remote switch and adjustable circuit-monitoring functions in a DIN-rail unit. Its white LCD displays electrical readings, while Tuya Smart or Smart Life provides remote ON/OFF control, energy monitoring and timer functions. The switching contact disconnects L only; N is not switched.
Protection and control functions
Adjustable over-voltage, under-voltage, over-current, overload power, leakage-current and high-temperature settings are available in the app. Automatic reconnection delay and a reconnection-count limit can also be set. Other functions include password protection, fault/alarm records, countdown, schedules, time-period current limiting, cycling and inching.
Clear LCD and local controls
The display presents voltage, current, leakage current and accumulated energy. Signal and power indicators show the operating state. SET, UP, DOWN and the manual switching key provide local control; the annotated front-panel illustration later on this page identifies these controls.
Metering and remote monitoring
Read voltage, current, leakage current, total kWh, active power, power factor and frequency on the phone. The app provides electricity statistics and operation/alarm records. The illustrated energy display range is 0–99,999.9 kWh. App screens are function examples; displayed measurements are illustrative.
Technical selection summary
| Model | OVA-63T; white-screen version |
|---|---|
| Maximum current | 63 A; current setting adjustable from 1 to 63 A |
| Supply and frequency | AC 110/220 V L–N systems; 50/60 Hz |
| Operating voltage reference | Illustrated specification: 85–300 V; written source: 80–300 V. Use the supplied unit rating. |
| Switched conductor | L only; N is not disconnected by the switching function |
| Wireless network | 2.4 GHz WiFi only; 5 GHz is not supported |
| Apps | Tuya Smart / Smart Life |
| Measurement | Voltage, current, leakage current, energy, power, power factor and frequency |
| Energy display range | 0–99,999.9 kWh |
| Power consumption | Written specification <2 W; illustrated reference ≤2 W |
| Installation | DIN-rail mounting; upper IN and lower OUT terminals |
Adjustable protection parameters
| Overload power threshold | 1–17 kW; stated default 13 kW |
|---|---|
| Overload delay | 1–500 s; stated default 1 s |
| Under-voltage threshold | Written: 80–210 V, default OFF; illustrated reference: 85–200 V |
| Under-voltage delay | 1–500 s; stated default 1 s |
| Over-voltage threshold | 120–300 V; stated default 270 V |
| Over-voltage delay | 1–500 s; stated default 1 s |
| Over-current threshold | 1–63 A; stated default 63 A |
| Over-current delay | 1–500 s; stated default 1 s |
| High-temperature threshold | 1–200°C; confirm the default on the supplied unit |
| Temperature protection delay | 1–500 s; stated default 1 s |
| Leakage-current threshold | Written: 0–99 mA, default 0 mA; illustrated reference: 10–99 mA |
| Leakage-current delay | 0.1–10 s; stated default 0.1 s |
| Reconnection delay | Written: 0–500 s, default 10 s; illustrated reference: 1–500 s |
| Reclosure count limit | 1–30; stated default 5 |
| Voltage/current/power calibration | −9.9% to +9.9% |
| Action time reference | Written range 1–30 s; its separately stated 0.5 s default is inconsistent and is not used as a guaranteed value |
Temperature monitoring
The app displays temperature data and provides an adjustable high-temperature protection setting. The original written source gives an incorrect unit for its temperature default; check the actual device setting rather than assuming a corrected default.
Prepaid energy function
A prepaid energy allowance can be entered in the app. The source describes switching off the supply when the allocated kWh is used up. The app illustration shows the remaining energy allowance and its settings.
Timers, rate limiting and relay memory
Schedule ON/OFF events, use a countdown for a selected duration, repeat an ON/OFF cycle, or use inching for a short timed operation. Time-period rate limiting applies different current limits during selected periods. The relay restart choices are OFF, ON and MEMORY; MEMORY retains the last switching state for power recovery.
Settings, records and password protection
The local display illustrates voltage, current and leakage settings, reconnection delay and backlight time. App operation records and alarm records help review previous switching events. Password protection prevents unauthorised setting changes. Factory reset is also provided.
Wiring
Connect the L and N supply to the upper IN terminals and the load to the lower OUT terminals, following the marked conductor positions. This is an L-switching product. The wiring illustration below shows the terminal arrangement.
Front-panel display and buttons
The original annotated diagram identifies the WiFi signal indicator, power indicator, voltage, current, energy and leakage-current readings, SET/menu key, adjustment keys and manual switch.
Original parameter reference
The illustrated parameter reference below is retained with its applicable limits. Its voltage, leakage-setting and reconnection limits differ from the written specification, so check the actual delivered version before programming.
Dimensions
The illustrated parameter table states 84 × 36 × 65 mm. The separate original drawing shows 85 mm height and 37 mm width, with 35 mm and 45 mm reference dimensions on the side view. Both original references are retained; confirm actual enclosure dimensions for cabinet layout.
