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The TENSE ERV-08 is a multi-function electronic time relay manufactured by TENSE Electronic DGK-04F of Turkey. It is suitable for various time-control applications in industrial automation, residential and commercial fields. It offers a wide timing range of 0.1 second to 100 horas, supports DIN-rail mounting, and features high reliability and ease of use.
- Core Specifications Overview
| Item | Details |
| Modelo | ERV-08 (Padrão) / ERV-08M (Enhanced) |
| Tipo | Multi-function electronic time relay |
| Marca | TENSE (Peru) |
| Tensão de alimentação | 12V–240V AC/DC (wide voltage range) |
| Standard Versions | 220V AC/24V DC (most common), 110V AC/24V DC |
| Timing Range | 0.1 s – 100 h (continuously adjustable) |
| Timing Accuracy | Quartz crystal oscillator, error ≤ 0.1% + 10 EM |
| Time Ranges | 6 selectable ranges: 10 é, 100 é, 10 min, 100 min, 10 h, 100 h |
| Configuração de contato | 1 changeover contact (SPDT) |
| Contact Rating | 5A 250V AC (resistive load), 5A 30V DC |
| Montagem | DIN-rail mounting (EM 50022) or panel mounting |
| Classe de Proteção | IP20 (touch-proof, dust-protected) |
| Temperatura operacional | -10℃ ~ +55℃ |
| Temperatura de armazenamento | -25℃ ~ +70 ℃ |
| Peso | Aprox.. 80 g |
| Certificações | CE, RoHS |
- Key Product Features
2.1 Wide Compatibility
Wide voltage design: Universal 12V-240V AC/DC power supply, compatible with most electrical systems worldwide.
Ultra-wide timing range: From 0.1 second to 100 horas, covering almost all industrial and civil time-control requirements.
Multi-range selection: 6 time range options, quick setting via rotary knob.
2.2 High Precision & Reliability
Quartz crystal oscillation: Provides extremely high timing accuracy, superior to conventional electromagnetic time relays.
Solid-state electronic design: No mechanical contact wear, longa vida útil, strong vibration and shock resistance.
Wide temperature operation: Adapts to industrial ambient temperature changes for stable performance under harsh conditions.
2.3 Operação fácil & Instalação
Dual-knob control: “Time Steps” knob for range selection, “t” knob for fine adjustment.
DIN-rail mounting: Standard 35mm DIN rail for fast installation and removal.
Clear indication: Power and output LEDs clearly show operating status.
- Operating Modes & Applications
3.1 Standard Operating Modes
- No atraso: Contacts actuate after the set time delay when power is applied.
- Atraso desligado: Contacts reset after the set time delay when power is removed (supported by ERV-08M).
3.2 Typical Application Areas
- Industrial automation: Sequential production line control, motor start delay, intermittent pump control.
- Building electrical: Lighting timer control, delayed ventilation, elevator door control.
- Sistemas HVAC: Air conditioning compressor protection delay, fan timer operation, heat pump cycle control.
- Water treatment: Alternating pump operation, filter backwash timer, sedimentation tank sludge discharge control.
- Agricultural applications: Irrigation system timing, greenhouse ventilation and temperature control.
- Model Differences & Variants
| Modelo | Main Differences | Application |
| ERV-08 | Standard version, mainly supports on-delay | General industrial control, simple timing applications |
| ERV-08M | Enhanced version, supports on-delay and off-delay | Complex applications requiring dual timing control |
| ERV-08RC | With 3m extension cable, for remote installation | Long distance between control cabinet and field devices |
| ERV-08-S | Sealed type, IP65 protection | Outdoor, dusty or humid environments |
- Wiring & Operation Guide
5.1 Standard Terminals
| Terminal | Descrição |
| A1 | Power supply (+) |
| A2 | Power supply (–) |
| 1 | Common contact |
| 2 | Normally closed contact (NC) |
| 3 | Normally open contact (NÃO) |
5.2 Etapas da operação
- Connect power (A1, A2) and load (1-2 ou 1-3).
- Turn the “Time Steps” knob to select the time range (por exemplo, 10-minute range).
- Turn the “t” knob to set the precise time value (0.1-10 times the range value).
- Apply power; the time relay starts operating, and contacts actuate when the set time is reached.
- Seleção & Alternatives
6.1 Key Selection Parameters
- Tensão de alimentação: Choose according to on-site power (220V AC or 110V AC).
- Timing range: Select appropriate range based on control requirements (0.1s-100h).
- Contact rating: Ensure rated current ≥ load current (5A for resistive loads; derate for inductive loads).
- Operating mode: Select on-delay or off-delay based on control logic (ERV-08M).
6.2 Recommended Alternatives
| Original | Replacement | Marca | Vantagens |
| TENSE ERV-08 | OMRON H3CR-A8 | Omron | World-renowned brand, richer function options |
| TENSE ERV-08 | Schneider RE22R20MW | Schneider Electric | Wide voltage, strong anti-interference |
| TENSE ERV-08 | ABB CT-MFE | ABB | High precision, long life, industrial-grade reliability |
| TENSE ERV-08 | CHINT NJS1 | CHINT (China) | Cost-effective, local technical support |
- Operating Notes
- Ambiente: Avoid installation in high-temperature, humid, dusty or corrosive gas environments.
- Correspondência de carga: Use surge suppressors for inductive loads (motores, contatores) to prevent arc damage to contacts.
- Wiring: Ensure correct polarity and secure connections to avoid poor contact.
- Accuracy: Ambient temperature may affect timing accuracy; best performance at room temperature (25℃).
- Maintenance: Regularly check LED status and contact condition for proper operation.
As a cost-effective multi-function time relay, the TENSE ERV-08 is widely used globally thanks to its wide voltage, wide timing range and high reliability. It is especially suitable for small and medium-sized automation systems and civil electrical control fields.
