Astronomical Timer Relays Selection Guide: Technical Criteria & Application Standards
Astronomical Timer Relays selection guide: technical parameters, mounting and compliance standards, and Entes, Schneider Electric, Tense comparison.
An astronomical timer relay is a timer relay that calculates sunrise and sunset times from the entered location and date and switches lighting on and off without a light sensor. It is used in circuits that should switch on at sunset and off at sunrise, such as street and area lighting, signs, shop windows, residential complex and parking lot lighting. The category includes the Entes DTR series and Tense models; there are single- and double-contact types, types with RS485 communication, with external memory, and with the five daily prayer times feature. Choose the model according to the number of contacts and contact current, supply voltage, number of programs, how the location is set, and communication needs. The 10 A and 16 A relay output values in the product data are for resistive loads; for luminaires with LED drivers and ballasts, verify the permitted load from the manufacturer data. An astronomical timer relay does not measure ambient light and operates according to the calculated times; in this respect, it must not be confused with a photocell relay. The Astronomical Timer Relays category on Welibaba includes 10 active models from leading manufacturers such as Entes, Schneider Electric, Tense.
Key Technical Parameters for Selecting Astronomical Timer Relays
To specify the right Astronomical Timer Relays model for your panel or installation, verify the following parameters against your engineering schedule:
| Parameter | Typical Catalog Values | Verification Note |
|---|---|---|
| Relay Output | 1 Röle Çıkışı (16A), 1 × 10 A / 250 VAC (rezistif yük), 2 Röle Çıkışı (16A), 2 × 16 A / 250 VAC (rezistif yük) | Verify against project schedule and load calculation |
| Number of Programs | 100, 15, 32 | Verify against project schedule and load calculation |
| Contact Type | 5 Vakit Namaz Saati ve Çift Kontak, Harici Bellek ve Tek Kontak, RS485 Haberleşmeli ve Tek Kontak, RS485 Haberleşmeli ve Çift Kontak | Verify against project schedule and load calculation |
| Supply Type | 190–260 V AC, 85–265 V AC | Verify against project schedule and load calculation |
Installation, Compatibility, and Commissioning Checklist
- Electrical & Mechanical Matching: Confirm that rated voltage, current capacity, and mounting dimensions align with the upstream and downstream components in Control Relays.
- Environmental & Enclosure Rating: Check IP protection class, housing material, and terminal capacity for dusty, humid, or high-vibration industrial environments.
- Related Product Groups: If your application calls for a different form factor or rating, compare sibling categories such as Submersible Pump Control Relays, Safety Relays, Photocell Relay Accessories.
Frequently Asked Questions
What is the first parameter to check when selecting Astronomical Timer Relays?
Start by confirming the circuit's rated electrical values and physical mounting dimensions, then use the technical attribute filters on the Astronomical Timer Relays page to narrow down compatible series.
Which Astronomical Timer Relays brands are available on Welibaba?
Welibaba currently stocks 10 active models in this category from manufacturers including Entes, Schneider Electric, Tense, complete with verified specifications and unit pricing.
How can I compare Astronomical Timer Relays models by manufacturer part number?
You can search directly by manufacturer SKU/order code or use the category filter panel to compare equivalent models across brands side by side.