COTEK SD3500 Series 3500W Pure Sine Wave Owner’s Manual
- June 12, 2024
- COTEK
Table of Contents
3500W Pure Sine Wave
SD3500 series

Features:
- Parallel redundancy design for power expansion
- Multiple industrial applications that create 1Ф3W / 3Ф4W power systems
- Automatic master mechanism to eliminate single point failure and optimize reliability
- Built-in ATS and AC circuit breaker
- Optional STS module, transfer time less 4ms.
- RS-232 communication
- Input & output fully isolation
- Output voltage / power saving mode selectable by DIP switch or remote control (CR-10)
- Input Protection: Reverse Polarity (Fuse) / Under Voltage / Over Voltage
- Output Protection: Short Circuit / Overload / Over Temperature / Over Voltage

LED Status:
| Green LED | LED Signal | Status |
|---|---|---|
| Solid | Power OK | |
| Slow Blink | Power Saving | |
| Intermittent Blink | Bypass | |
| Orange LED | LED Signal | Status |
| Fast Blink | OVP | |
| Slow Blink | UVP | |
| Red LED | LED Signal | Status |
| Intermittent Blink | OTP | |
| Fast Blink | OVP- Shut-down | |
| Slow Blink | UVP- Shut-down | |
| Solid | OLP | |
| Intermittent Blink | Fan Failure | |
| Intermittent Blink | Component Failure |
Output Socket:

De-rating Curve:

Transfer Time :
Transfer-Time Table
Mode/Transfer
Switch| ATS| STS
Haphazard| Inverter to utility AC : 8 ~ 10ms.;
Utility AC to inverter :16 ~ 50ms.| Frequency is synchronized : <4ms
Frequency is not synchronized :
Inverter to utility AC : <4ms.;
Utility AC to inverter :16 ~ 50ms.
Normal| Inverter to utility AC : 8 ~ 10ms.;
Utility AC to inverter :16 ~ 25ms.| <4ms
Exacting| Inverter to utility AC : 8 ~ 10ms.;
Utility AC to inverter :16 ~ 50ms.| Inverter to utility AC : <4ms.;
Utility AC to inverter :16 ~ 50ms.
Online| Inverter to utility AC : 8 ~ 10ms.;
Utility AC to inverter :16 ~ 25ms.| <4ms
Mechanical Drawings:
Unit : mm [inch]

REV. A9
22/09/20
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