EATON Digitrip-RMS 310+, 610 and 910 Electronic Trip Units
Digitrip RMS Trip Units — Multi-Function Electronic Trip Units for All Applications
True rms Sensing
Digitrip rms trip units use Eaton’s microprocessor-based intelligence to provide true rms sensing, permitting increased accuracy and reliable system protection. True rms sensing is not susceptible to nuisance tripping when waveforms containing high harmonic currents are present.
Digitrip RMS 310+
Digitrip RMS 310+ electronic trip units are available with Eaton circuit breakers JG, LG, NG and RG. They are selectable long time delay (tLD) and pickup settings (Ir). A rating plug is not required. The Digitrip 310+ offers true rms sensing, is front adjustable and has an optional local display of current and cause of trip.
Rating Plugs
If rating plugs are needed for the R-Frame, they are markedfor 50/60 Hz applications. Both fixed and adjustable rating plugs are available, providing further flexibility when applied to selectively coordinated systems.
Curve Shaping
When selectively coordinated systems are called for, Digitrip RMS 310+ will provide a cost-effective solution for a variety of applications.
The standard Digitrip RMS 310+ includes an adjustable short time pickup setting encompassing an I2t ramp function that provides the basic LS curve shaping function. JG-, LG-, NG- and RG-Frames have an adjustable long time delay.
JG-, LG-, NG- and RG-Frames have selectable long time delay (tLD) and pickup settings (Ir). A rating plug is not required.
The optional Digitrip RMS 310+ provides additional flat response short time delay adjustments on an instantaneous setting to provide LSI curve shaping capability.
Digitrip RMS 310+ trip units are available with ground fault pickup and flat response ground fault delay, which provides the trip unit with full function LSG and LSIG curve shaping flexibility.
Digitrip RMS 310+ trip units can effectively coordinate with both sophisticated upstream power breakers as well as downstream thermalmagnetic breakers, making Digitrip RMS 310+ trip units the cost-effective reliable choice for selectively coordinated systems.
Thermal Memory
All Digitrip RMS trip units incorporate a long delay. Thermal memory prevents the system from cumulative overheating due to repeated overcurrent events that may occur in quick succession.
Field Testing
A field test kit is available for Digitrip RMS 310+ trip units.
Arcflash Reduction Maintenance Mode (ARMS)
ARMS is an available feature on the LG- and NG-Frame with 310+ electronic trip units. This feature increases worker safety by providing an accelerated instantaneous trip unit to reduce arc flash.
Digitrip RMS 610 and 910
Digitrip RMS 610 and 910 trip units are available with Eaton R-Frame circuit breakers 800 through 2500 amperes. Digitrip 610 and 910 trip units provide unparalleled system protection with the added convenience of a local display.
Curve Shaping
Digitrip RMS 610 and 910 trip units are available with up to nine curve shaping choices achieved by adjusting up to seven switches on the front of the unit for optimum system coordination. Maximum curve shaping flexibility is provided by dependent long and short delay adjustments that are long delay pickup (Ir) based, depicted on the front of the unit by the blue portion of the time-current curve.
Additional coordination capability can be provided by utilizing the short delay and ground fault zone selective interlocking features available on these trip units.
System Diagnostics
Digitrip RMS 610 and 910 models of trip units provide long delay, short delay, instantaneous, and ground fault cause of trip LEDs on the front of the unit. Their display shows a magnitude of trip information, as well as remote signal contacts, for improved system alarming.
System Monitoring
Digitrip 610 and 910 trip units have the capability to monitor phase currents, as well as neutral or ground currents. This information is displayed on a large digital display mounted on the unit.
Digitrip RMS 910 trip units can also provide the user with power and energy monitoring capability. Peak power demand, present power demand, and total energy, as well as forward and reverse energy can be monitored with this unit.
Digitrip RMS 910 trip units have the additional capability of monitoring line-to-line voltage, as well as system power factor. Both parameters are displayed in the digital display window and are supported by LEDs to indicate which parameter is being displayed.
Harmonics Monitoring
Digitrip RMS 910 trip units are capable of displaying values of current harmonics in the digital display window. Percentage of harmonic content can be monitored for each phase, up to the 27th harmonic. Additionally, a total harmonic distortion value can be calculated and displayed.
Communications
Digitrip RMS 910 units have built-in communications options to allow all protection, monitoring, and control information to be transmitted back to a central location via the Eaton PowerNet™ system.
Field Testing
Integral field testing capability is provided on all 610 and 910 trip units. No additional test set is needed to perform both trip and no trip field testing.
Digitrip RMS Technical Specifications
| Breaker Type | |||||
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 |
 |
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| Eaton frame(s) | JG-, LG-, NG- and RG-Frames | RG-Frame | RG-Frame | ||
| Ampere rating | 20–2500A | 800–2500A | 800–2500A | ||
| Interrupting rating at 415V | 35, 70, 100 kA | 70, 100 kA | 70, 100 kA | ||
| Trip Unit Sensing | |||||
| rms sensing | Yes | Yes | Yes | ||
| Protection and Coordination | |||||
| Protection | Ordering options | LS, LSG | LSI, LSIG | LI, LS, LSI, LIG, LSG, LSIG | LI, LS, LSI, LIG, LSG, LSIG |
| Fixed rating plug (In)(1) |
Yes | Yes | Yes | Yes | |
| Overtemperature trip |
Yes | Yes | Yes | Yes | |
| Long delay | Adjustable rating plug (ln)(1) |
Yes | Yes | No | No |
| Long delay setting |
0.5–1.0 (ln)(2) | 0.5–1.0 (ln)(2) | 0.5–1.0 x (ln) | 0.5–1.0 x (ln) | |
| Long delay time I2t at 6x |
10 seconds(2) | 10 seconds(2) | 2–24 seconds | 2–24 seconds | |
| Long delay thermal memory |
Yes | Yes | Yes | Yes | |
| High load alarm |
No | No | 0.85 x Ir | 0.85 x Ir | |
| Short delay | Short delay setting |
VAR/frame 3 | VAR/frame 3 | 200–600% S1 and S2 x (Ir) | 200–600% S1 and S2 x (Ir) |
| Short delay time I2t |
100 ms | No | 100, 300, 500 ms | 100, 300, 500 ms | |
| Short delay time flat |
No | I–300 ms | 100–500 ms | 100–500 ms | |
| Short delay time ZSI |
No | No | Yes | Yes | |
| Instantaneous | Instantaneous setting |
No | 200–800% x (ln) 4 | 200–600% M1 and M2 x (ln) | 200–600% M1 and M2 x (ln) |
| Discriminator | No | No | Yes(5) | Yes(5) | |
| Instantaneous override |
Yes | Yes | Yes | Yes | |
| Ground fault | Ground fault setting |
VAR/Frame 6 | VAR/Frame 6 | 25–100% x (ln) 6 | 25–100% x (ln) 6 |
| Ground fault delay I2t at 0.62x |
No | No | 100, 300, 500 ms | 100, 300, 500 ms | |
| Ground fault delay flat |
I–500 ms(7) | I–500 ms(7) | 100–500 ms | 100–500 ms | |
| Ground fault ZSI |
No | No | Yes | Yes | |
| Ground fault thermal memory |
No | No | Yes | Yes | |
| System Diagnostics | |||||
| LS, LSG | LSI, LSIG | LSI, LSIG, LSIG (A) | LSI (A), LSIG | ||
| Cause of trip LEDs | Yes D | No | Yes | Yes | |
| Magnitude of trip information | No | No | Yes | Yes | |
| Remote signal contacts | No | No | Yes | Yes | |
| System Monitoring | |||||
| Digital display | Yes® | No | Yes | Yes | |
| Current | Yes® | No | Yes | Yes | |
| Voltage | Yes® | No | No | Yes | |
| Power and energy | Yes® | No | No | Yes | |
| Power quality—harmonics | No | No | No | Yes | |
| Power factor | No | No | No | Yes | |
| System Communications | |||||
| PowerNet | No | No | No | Yes | |
| Field Testing | |||||
| Testing method | Test Set | Test Set | Integral | Integral | |
NOTES:
D Using cause of trip module (catalog number TRIP-LED).
® Using ammeter or remote ammeter/cause of trip display (catalog number DIGIVIEW and DIGIVIEWR06).
In = Rating plug rating.
Ir = Long delay setting.
(1) JG- and LG-Frames have selectable settings instead of a rating plug.
(2) JG-, LG- and NG-Frames have adjustable long delay times of 2–24 seconds.
(3) JG/LG: 2X–14X (In); NG: 2X–8X (In); RG: 2X–8X (In); 2500 ampere RG-Frame 200–600% x (In).,br />
(4) JG-Frame also has a 14X setting.
(5) LS, LSG only.
(6) Not to exceed 1200 amperes.
(7) JG- and LG-Frames are Instantaneous, 120 ms. NG- and RG-Frames are Instantaneous, 100, 300 and 500 ms.