1. Introducció
The SINOTIMER SVP912 is an advanced adjustable voltage surge protector relay designed to safeguard electrical appliances and systems from overvoltage, minvartage, and overcurrent conditions. This device features a dual LED display for real-time voltage and current monitoring and offers adjustable protection parameters. It is suitable for DIN rail installation in domestic and industrial distribution boxes, providing automatic recovery of power supply once voltage returns to normal operating ranges.

Figura 1: Frontal view of the SINOTIMER SVP912 Adjustable Voltage Protector Relay, showing the LED display and control buttons.
2. Característiques del producte
- Over/Undervoltage Protecció: Automatically disconnects power when voltage exceeds or falls below set thresholds.
- Protecció contra sobreintensitat: Disconnects power if the current draw exceeds the configured limit.
- Recuperació automàtica: Restaura el subministrament d'energia automàticament un cop el circuit ha baixat de volum.tage and current return to normal operating parameters after a fault.
- Pantalla LED dual: Provides real-time display of measured voltage i corrent.
- Adjustable Protection Values: Overvoltage, minvartage, overcurrent, and fault recovery delay times are user-adjustable.
- Indicadors visuals: Dedicated LED indicators (Over(V) and Under(V)) provide immediate visual feedback on protection status.
- Instal·lació de carril DIN: Designed for easy mounting within standard distribution boxes.
3. Especificacions
| Especificació | Valor |
|---|---|
| Número de model | SVP912-1-80A DLR |
| Corrent nominal | 80 Amps |
| Bobina Voltage | 120 volts (CA) |
| Vol. de commutació mínimatage | 120 volts (CA) |
| Mode d'operació | Automàtic |
| Tipus de muntatge | Muntatge sobre carril DIN |
| Tipus de connector | Cargol |
| Material de contacte | coure |
| Tipus de contacte | Normalment obert |
| Garantia | 1 anys de fabricant |

Figure 2: Dimensional drawing of the SVP912, showing measurements such as 85mm height, 35mm width, and 65mm depth.
4. Instal·lació i configuració
The SVP912 is designed for DIN rail mounting. Ensure all power is disconnected before beginning installation to prevent electrical shock.
- Muntatge: Securely attach the SVP912 to a standard 35mm DIN rail within your distribution box.
- Cablejat: Connect the incoming power supply (Line 'L' and Neutral 'N') to the 'IN' terminals of the protector. Connect the load (outgoing power) to the 'OUT' terminals. Ensure correct polarity.
- Circuit Breaker Integration: It is recommended to install an appropriate circuit breaker (e.g., an air circuit breaker) upstream of the voltage protector for additional safety and circuit protection.

Figure 3: Wiring diagram illustrating the connection of the SVP912 between a power switch and an air circuit breaker, showing input (IN) and output (OUT) terminals for Line (L) and Neutral (N).
After wiring, double-check all connections for tightness and correctness before restoring power.
5. Funcionament
Upon power-up, the SVP912 will display the current voltage and current readings. The device is pre-configured with default protection values, which can be adjusted as needed.
5.1 Pantalla i indicadors
- The main LED display shows the real-time voltage (V) i corrent (A).
- The 'Over(V)' LED illuminates when an overvoltagEs detecta la condició.
- The 'Under(V)' LED illuminates when an undervoltagEs detecta la condició.

Figura 4: Primer pla view of the SVP912's control panel, highlighting the 'SET' button, adjustment arrows, and LED indicators for Over(V) and Under(V).
5.2 Adjusting Protection Parameters
To adjust the protection values:
- Premeu el botó SET button to enter the parameter setting mode. The display will show the first adjustable parameter (e.g., overvoltagllindar electrònic).
- Utilitza el Amunt (▲) i Avall (▼) arrow buttons to increase or decrease the value.
- Premeu SET again to confirm the current parameter and move to the next adjustable parameter (e.g., undervoltage threshold, overcurrent limit, recovery delay time).
- Repeat steps 2 and 3 for all desired parameters.
- After setting the last parameter, the device will automatically save the settings and return to normal operation mode.
Refer to the labels on the device (e.g., Uvo: AC130V-150V, Uve: AC80V-100V, Recovery time: 2-512s) for the default ranges and units of adjustable parameters.
6. Manteniment
The SINOTIMER SVP912 is designed for reliable, long-term operation with minimal maintenance. Periodically inspect the device and its connections for any signs of wear, damage, or loose wiring. Ensure the area around the protector is clean and free from dust or debris to maintain proper ventilation.
7. Solució De Problemes
Si el dispositiu no funciona com s'esperava, tingueu en compte el següent:
- Sense pantalla/Sense alimentació: Check the incoming power supply and ensure all wiring connections are secure. Verify the upstream circuit breaker is not tripped.
- Sortides freqüents: Review el teu conjunt sobrevoltage, minvartage, and overcurrent thresholds. They might be set too sensitively for your application. Check for actual voltage fluctuations or excessive current draw from connected appliances.
- Device Not Recovering: Ensure the fault condition (over/undervoltage, overcurrent) has genuinely cleared and remained stable for the set recovery delay time.
- Lectures incorrectes: Si el vol mostrattage or current seems inaccurate, ensure proper wiring and contact a qualified electrician for verification.
For persistent issues, consult a qualified electrician or contact SINOTIMER customer support.
8. Garantia i Suport
The SINOTIMER SVP912 comes with a 1 any de garantia del fabricantAquesta garantia cobreix els defectes de materials i de fabricació en condicions d'ús normal. Si us plau, conserveu el comprovant de compra per a reclamacions de garantia.
For technical support, warranty service, or further inquiries, please contact SINOTIMER directly through their official channels or visit their brand store for more information.
You can find more information about SINOTIMER products and support at the SINOTIMER Store.







