TPBG-12 Three-Phase Four-Wire Adjustable Voltage and Current Protector
Six-window display for L1/L2/L3 voltage and current · 63 A / 80 A / 100 A versions · 35 mm DIN rail mounting Engineered to align with IEC 60947 series standards, built with components from certified supply chain partners.
– Six independent windows show L1, L2 and L3 voltage and current simultaneously — no scrolling, no external meters
– Fifteen adjustable parameters (P-1 to P-15): over/undervoltage set points, recovery values, unbalance thresholds, overcurrent limit and action delays
– Full three-phase protection set: overvoltage, undervoltage, voltage unbalance, overcurrent, current imbalance, continuous overcurrent lockout and phase sequence error
– Three current versions (63 A / 80 A / 100 A) on a single 35 mm DIN rail footprint, with OEM branding and custom factory defaults available
Product Overview
A three-phase voltage protector is a DIN-rail protection device that continuously monitors the voltage and current of a three-phase four-wire supply and disconnects the downstream load when a preset limit is exceeded. The TPBG-12 performs this function with six independent display windows — one voltage and one current reading for each of L1, L2 and L3 — so an installer can verify the whole supply at a glance instead of switching between readings or adding separate panel meters.
All fifteen protection parameters are adjustable from the front panel using the SET and arrow keys. Over- and undervoltage trip points, their recovery values, three-phase voltage unbalance, overcurrent limit, current imbalance and the associated action delays can each be tuned to the site rather than accepted as fixed factory values. This matters on weak grids and generator-fed installations, where a protector set too tight nuisance-trips all day and one set too loose leaves motors and compressors exposed.
The TPBG-12 also detects reversed phase sequence, displaying L1-L3-L2 and dropping the output before a three-phase motor can run backwards. Recovery is automatic once the supply returns within the hysteresis band; a continuous overcurrent lockout requires manual reset, so a repeating fault cannot cycle unattended. TYPLE supplies the TPBG-12 in 63 A, 80 A and 100 A versions, backed by more than 10+ years in the Liushi low-voltage electrical supply hub.
TPBG-12 Technical Specifications
| Parameter | Specification |
|---|---|
| Product type | Three-phase four-wire adjustable voltage and current protector |
| Model | TPBG-12 |
| Wiring configuration | 3P+N (L1, L2, L3, N in / L1, L2, L3, N out) |
| Rated current versions | 63 A / 80 A / 100 A |
| Display | Six windows: L1/L2/L3 voltage + L1/L2/L3 current |
| Indicators | POWER · >V overvoltage · <V undervoltage · >A overcurrent |
| Front panel controls | SET (menu) · ▲ / ▼ (adjust) · manual on/off key |
| Protection functions | Overvoltage · undervoltage · three-phase voltage unbalance · overcurrent · current imbalance · continuous overcurrent lockout · phase sequence error |
| Adjustable parameters | 15 (P-1 to P-15, front-panel settable) |
| Reset behaviour | Automatic after voltage or current fault recovery; manual reset after continuous overcurrent lockout |
| Calibration | Voltage ±9.5 V · current ±9.5 A field calibration |
| Mounting | 35 mm DIN rail |
| Reference Standards | IEC 60947 series |
TPBG-12 Model Selection
| Version | Rated current | Overcurrent setting range (P-11) |
|---|---|---|
| TPBG-12 63 A | 63 A | 1–63 A |
| TPBG-12 80 A | 80 A | 1–80 A |
| TPBG-12 100 A | 100 A | 1–100 A |
Voltage protection parameters are identical across all three versions; only the current range differs.
Adjustable Protection Parameters (P-1 to P-15)
| Code | Parameter | Setting range | Factory default |
|---|---|---|---|
| P-1 | Power-on delay time | 1–999 s | 5 s |
| P-2 | Protection recovery delay | 1–999 s | 30 s |
| P-3 | Overvoltage protection value | 120–300 V | 270 V |
| P-4 | Overvoltage recovery value | 115–295 V | 265 V |
| P-5 | Undervoltage protection value | 80–210 V | 170 V |
| P-6 | Undervoltage recovery value | 85–215 V | 175 V |
| P-7 | Voltage protection action delay | 0.1–10 s | 0.5 s |
| P-8 | Three-phase voltage unbalance value | 20–100 V | 50 V |
| P-9 | Three-phase voltage unbalance recovery value | 5–90 V | 20 V |
| P-10 | Three-phase voltage calibration | −9.5 to +9.5 V | 0 |
| P-11 | Overcurrent protection value | 1 A to 63 / 80 / 100 A | 100 A |
| P-12 | Overcurrent protection action time | 0.1–10 s | 1 s |
| P-13 | Current imbalance value | 0.5–10 A | OFF |
| P-14 | Continuous overcurrent protection frequency | 0–20 | OFF |
| P-15 | Three-phase current error calibration | −9.5 to +9.5 A | 0 |
Fault Indication and Reset Behaviour
| Condition | Display | Behaviour |
|---|---|---|
| Power-on / reset countdown | Countdown in seconds on the L1 window, live voltage on L2 and L3 | Output relays close when the delay expires |
| Overvoltage or undervoltage | Live voltage and current values flash, >V or <V indicator lights | Output drops; resets automatically once the supply returns within the hysteresis band |
| Three-phase voltage unbalance | Fault indicator lights | Output drops; recovers when unbalance falls below the P-9 value |
| Overcurrent | >A indicator lights, values flash | Output drops; resets automatically after the recovery delay |
| Continuous overcurrent | oFFon all three current windows |
Output stays disconnected; manual reset required |
| Phase sequence error | L1 – L3 – L2on the voltage windows |
Output disconnected from the supply |
Wiring diagram supplied with the product is for reference; the as-built installation governs.
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TPBG-12 Applications
Commercial and light industrial distribution boards — protects three-phase feeders in workshops, cold rooms and small factories where the incoming supply is the weakest link in the installation.
Motor, pump and compressor circuits — phase sequence detection prevents reverse rotation on start-up, while current imbalance and overcurrent settings guard windings against single-phasing and mechanical overload.
Generator-fed and unstable grid sites — adjustable trip points and delays let installers in regions with frequent voltage swings set a threshold the site can actually live with, instead of replacing tripped equipment.
Building services and rental power — six-window metering gives facility teams a permanent readout of the supply condition without adding separate panel meters to the board.
Three-Phase Voltage Protector OEM & Customization
TYPLE offers flexible OEM and ODM services for three-phase voltage protectors, including pre-configured factory defaults for your target market, front-panel and enclosure branding, custom labelling and retail or bulk packaging. Backed by the Liushi low-voltage electrical supply hub, we deliver customized solutions with short lead times, and can quote the TPBG-12 alongside the MCBs, SPDs and distribution enclosures that sit in the same board.
TPBG-12 FAQ
It monitors a three-phase four-wire supply and disconnects the downstream load when voltage, current, phase balance or phase sequence moves outside the limits you set, protecting motors, compressors and distribution equipment from damage.
Yes. Overvoltage is settable from 120 to 300 V and undervoltage from 80 to 210 V, each with its own recovery value and action delay, all adjustable from the front panel using the SET and arrow keys.
Yes. Overvoltage is settable from 120 to 300 V and undervoltage from 80 to 210 V, each with its own recovery value and action delay, all adjustable from the front panel using the SET and arrow keys.
Voltage and overcurrent faults reset automatically once the supply recovers within the hysteresis band and the recovery delay expires. A continuous overcurrent lockout shows oFF on the current windows and requires manual reset.
It displays L1-L3-L2 on the voltage windows and disconnects the protector from the output supply, preventing three-phase motors from starting in reverse.
Yes. TYPLE supports custom factory default settings, panel and enclosure branding, labelling and packaging, with short lead times for OEM and ODM orders.
