Inrush Current and ETC LED Fixtures
The information below is to help you understand how inrush current works with our LED fixtures. For in-depth information on how to applies to the number of LEDs you can have on a circuit and how to determine that number, please read this white paper: How Many Fixtures on that Breaker.pdf
In the case of a switching power supply like those used in many electronics including ETC LED fixtures the inrush current is much higher than the nominal operating voltage. In some cases the current can be as much as 75 times higher for a short period of time, usually worst at the first half- cycle.
This can create an issue with circuit breaker protection for a line of fixtures all coming from the same non-dim source. The amount of fixtures that you can use at nominal voltage that will cause your circuit protection to engage is much higher than the amount of fixtures you can use upon inrush. To compound this, most circuit breakers have different inrush trip curves. To find the trip curve of a particular breaker, it is best to find the datasheet of the breaker in question. This makes it impossible for ETC to calculate across the board how many fixtures can be on a circuit as it can vary widely and is reliant upon the breaker installed in the system.
To avoid inrush problems, a good solution is to develop a startup sequence. This means that not every fixture would be started at the same time. This is common practice among high end audio gear for the same reason. This allows a device to power up past the inrush point before another fixture hits its’ inrush point.
Below is a graphic with a scope shot of a fixture upon startup. The green line is the current the fixture is drawing. This is a good visual illustration of what is happening when a fixture is powered on and then how it normalizes.
ColorSource Cyc Inrush
120V- 39A (First half-cycle)
240V- 74A (First half-cycle)
- 10 Fixtures/ R20 circuit (link up to 9 via power thru connector)
Nominal Power Consumption at Full Intensity
| Voltage (V) | Current (A) | Watts (W) |
|---|---|---|
| 120 | 1.11 | 133 |
| 240 | 0.59 | 116 |
ColorSource Fresnel V Inrush
120V- 36A (First half-cycle)
240V- 57A (First half-cycle)
- 9 Fixtures/ R20 circuit (link up to 8 via power thru connector)
Nominal Power Consumption at Full Intensity
| Voltage (V) | Current (A) | Watts (W) |
|---|---|---|
| 120 | 1.28 | 148.4 |
| 240 | 0.70 | 147 |
ColorSource Linear Inrush
120V- 35A (Linear 1) / 35.6A (Linear 2) / 67.5A (Linear 4) (First half-cycle)
240 V- 49A (Linear 1) / 85.6A (Linear 2) / 153A (Linear 4) (First half-cycle)
- 10 cells/ R20 circuit (link up to 9 cells via power thru connector)
Nominal Power Consumption at Full Intensity
| Model | Voltage (V) | Current (A) | Watts (W) |
|---|---|---|---|
| Linear 1 | 120 | 0.95 | 115 |
| Linear 2 | 120 | 1.82 | 218 |
| Linear 4 | 120 | 3.68 | 438 |
| Linear 1 DB | 120 | 0.92 | 110 |
| Linear 2 DB | 120 | 1.82 | 218 |
| Linear 4 DB | 120 | 3.70 | 440 |
| Linear 1 | 240 | 0.48 | 112 |
| Linear 2 | 240 | 0.91 | 213 |
| Linear 4 | 240 | 1.82 | 426 |
| Linear 1 DB | 240 | 0.46 | 108 |
| Linear 2 DB | 240 | 0.91 | 214 |
| Linear 4 DB | 240 | 1.83 | 428 |
ColorSource PAR Inrush
120V- 35A (First half-cycle)
240V- 49A (First half-cycle)
- 10 Fixtures/ R20 circuit (link up to 9 via power thru connector)
Nominal Power Consumption at Full Intensity
| Voltage (V) | Current (A) | Watts (W) |
|---|---|---|
| 120 | 0.75 | 90 |
| 240 | 0.4 | 89 |
ColorSource Spot Inrush
120V- 28A (First half-cycle)
240 V- 46A (First half-cycle)
- 10 Fixtures/ R20 circuit (link up to 9 via power thru connector)
Nominal Power Consumption at Full Intensity
| Voltage (V) | Current (A) | Watts (W) |
|---|---|---|
| 100 | 1.69 | 168 |
| 120 | 1.39 | 166 |
| 240 | 0.72 | 166 |
ColorSource Spot Jr. Inrush
120V- 35A (First half-cycle)
240 V- 45A (First half-cycle)
- 7 Fixtures/ R20 circuit
Nominal Power Consumption at Full Intensity
| Voltage (V) | Current (A) | Watts (W) |
|---|---|---|
| 120 | 1.40 | 166 |
| 240 | 0.73 | 162 |
ColorSource Spot V Inrush
120V- 55A (First half-cycle)
240 V- 59A (First half-cycle)
- 8 Fixtures/ R20 circuit
Nominal Power Consumption at Full Intensity
| Voltage (V) | Current (A) | Watts (W) |
|---|---|---|
| 100 | 2.00 | 199 |
| 120 | 1.65 | 197 |
| 240 | 0.90 | 194 |
D22 Inrush
120V- 17A (First half-cycle)
240V- 25A (First half-cycle)
- 20 Fixtures/ R20 circuit
Nominal Power Consumption at Full Intensity
| Voltage (V) | Current (A) | Watts (W) |
|---|---|---|
| 120 | 0.47 | 56.5 |
| 240 | 0.25 | 60 |
D40/ D40XT Inrush
120V- 15A (First half-cycle)
240V- 40A (First half-cycle)
- 10 Fixtures/ R20 circuit
Nominal Power Consumption at Full Intensity
| Voltage (V) | Current (A) | Watts (W) |
|---|---|---|
| 120 | 1 | 110 |
| 240 | 0.5 | 120 |
D40XTI Inrush
120V- 15A (First half-cycle)
240V- 40A (First half-cycle)
- 10 Fixtures/ R20 circuit
Nominal Power Consumption at Full Intensity
| Voltage (V) | Current (A) | Watts (W) |
|---|---|---|
| 120 | 1 | 110 |
| 240 | 0.5 | 120 |
D60 Inrush
120V- 15A (First half-cycle)
240V- 40A (First half-cycle)
- 10 Fixtures/ R20 circuit
Nominal Power Consumption at Full Intensity
| Voltage (V) | Current (A) | Watts (W) |
|---|---|---|
| 120/240 | 13.5/0.68 | 161 |
| 240 | 0.68 | 163.2 |
D60 XTI Inrush
120V- 46A (First half-cycle)
240V- 77A (First half-cycle)
- 10 Fixtures/ R20 circuit
Nominal Power Consumption at Full Intensity
| Voltage (V) | Current (A) | Watts (W) |
|---|---|---|
| 120 | 1.03 | 123.6 |
| 240 | 0.54 | 129.6 |
Desire Fresnel Inrush
120V- 28A (First half-cycle)
230V- 46A (First half-cycle)
- 9 Fixtures/ R20 circuit
Nominal Power Consumption at Full Intensity
| Voltage (V) | Current (A) | Watts (W) |
|---|---|---|
| 120 | 1.2 | 138 |
| 230 | 0.6 | 132 |
Source 4WRD II Inrush
120V- 30A (First half-cycle)
240V- 12A (First half-cycle)
- 120V: 14 Fixtures/ R20 circuit
- 240V: 6 Fixtures/ ER15AFR circuit
- line dimming: ETC recommends no more than 1 Source 4WRD fixture per circuit for line dfimming to maximize dimming performance.
Nominal Power Consumption at Full Intensity
| Voltage (V) | Current (A) | Watts (W) |
|---|---|---|
| 120 | 1.26 | 150 |
| 240 | 0.75 | 175 |
Source 4WRD Color Inrush
120V- 32A (First half-cycle)
240V- 60A (First half-cycle)
- 120V: 10 Fixtures/ R20 circuit
- 240V: 10 Fixtures/ ER15AFR circuit
Nominal Power Consumption at Full Intensity
| Voltage (V) | Current (A) | Watts (W) |
|---|---|---|
| 120 | 1.25 | 146 |
| 240 | 0.67 | 143 |
Source 4WRD Color II Inrush
120V- 32A (First half-cycle)
240V- 60A (First half-cycle)
- 120V: 10 Fixtures/ R20 circuit
- 240V: 10 Fixtures/ ER15AFR circuit
Nominal Power Consumption at Full Intensity
| Voltage (V) | Current (A) | Watts (W) |
|---|---|---|
| 120 | 1.25 | 146 |
| 240 | 0.67 | 143 |
Source Four LED Inrush
120V- 11A (First half-cycle)
240V- 15A (First half-cycle)
- 9 Fixtures/ R20 circuit
Nominal Power Consumption at Full Intensity
| Model | Voltage (V) | Current (A) | Watts (W) |
|---|---|---|---|
| Lustr+ | 120 | 1.11 | 129.9 |
| Daylight | 120 | 1.39 | 163.63 |
| Tungsten | 120 | 1.35 | 157.4 |
| Studio HD | 120 | 1.07 | 127.1 |
| Lustr+ | 240 | 0.56 | 135.36 |
| Daylight | 240 | 0.72 | 172.32 |
| Tungsten | 240 | 0.70 | 166.8 |
| Studio HD | 240 | 0.56 | 135.36 |
Source Four LED Series 2 Inrush
120V- 50A (First half-cycle)
240V- 107A (First half-cycle)
- 9 Lustr Fixtures/ R20 circuit
- 7 Daylight HD or Tungsten HD Fixtures/ R20 circuit
Nominal Power Consumption at Full Intensity
| Voltage (V) | Current (A) | Watts (W) |
|---|---|---|
| 120 | 1.45 | 174 |
| 240 | 0.81 | 195.12 |
Source Four Mini LED Inrush
120V- 3A (First half-cycle)
240V- 4A (First half-cycle)
Nominal Power Consumption at Full Intensity
| Voltage (V) | Current (A) | Watts (W) |
|---|---|---|
| 120/240 | ? | 14 |
Source Four LED Series 3 Inrush
120V- 40A (First half-cycle)
230V- 80A (First half-cycle)
- 5 Fixtures/ R20 circuit
Nominal Power Consumption at Full Intensity
| Model | Voltage (V) | Current (A) | Watts (W) |
|---|---|---|---|
| Lustr X8 | 120 | 2.6 | 307 |
| Daylight HDR | 120 | 2.85 | 340 |
| Lustr X8 | 230 | 1.35 | 305 |
| Daylight HDR | 230 | 1.5 | 330 |