Toshiba Model RC820 Solid State Motor Protection Relay
Toshiba Updated: 2007-07-18When motor protection needs are not quite as elaborate, this relay combines reliable protection against overloads and single phasing with a simple, easily adjustable design. As a motor overload protection relay, the 2E is adjustable from Class 3 through Class 40 to provide optimum protection and to accommodate reduced voltage starting and high inertia loads. Ground fault and phase reversal modules are available.
MODEL NUMBER RC820-
H/AP1Y H/AP2Y H/AP3Y
Applicable Circuit Three phase circuits, 50/60 Hz, 600Vac Above 600Vac with CTs
Protective Functions Overload and single phase protection
Rated Current Rated ampere-turns 7AT 55AT 110AT
Setting range 75 ~ 150% of rated AT
Overload Operating characteristics Ultimate trip current 105 ~ 125% of setting current
Operating time setting range 3 ~ 40 sec. for cold starting characteristics at 600% of setting current
Single Phase Operating Characteristics Minimum Operating current 85% of setting current must be flowing in the conducting phase
Operating time less than 4 sec.
Control Voltage Rating Std 100 ~ 120/200 ~ 240V AC 1f , 50/60 Hz
Tolerance 85% - 11%
Output Contact Specifications Contact arrangement 1NO/NC (Form C)
Contact capacity NEMA B300 120VAC - 5.0A (Resistive load)
120VAC - Make 30A / Break 3A
240VAC - Make 15A / Break 1.5A
125VDC - 0.2A (L/R = 7 ms)
250VDC - 0.1A (L/R = 7 ms)
Power Consumption Control power circuit 2VA
Detecting circuit 0.3VA / phase at rated current
Application Conditions Ambient temperature -10 ~ + 60oC
Relative humidity 45 ~ 85% at 20oC
Additional Specs RC81A* RC81B RC81C*
Phase reversal characteristics Operating current - 90% of 2E relay setting current 90% of 2E relay setting current
Operating time - Less than 0.5 sec. Less than 0.5 sec.
Ground fault characteristics Ground fault current setting 4A ~ 12A
ZCT Primary - 4A ~ 12A
ZCT Primary
Max. ground fault current 60A - 60A
Ground fault time setting 0.1 TO 1.0 sec. - 0.1 TO 1.0 sec.
Output signal Output contacts of basic relay
Trip indication LED (manual reset)
RC820 Manual
RC820 Brochure
Solid State Relay Flyer
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