Bussmann®
LOW-PEAK®
LPS-RK
Dual-Element, Time-Delay Fuses
Class RK1 – 600 Volt
0-60 Amps
Dimensional Data
5.5"
(± 0.31)
5"
(± 0.31)
.81" (±0.008)
1.06" (±0.008)
⁄Ω¡ºA to 30A
LPS-RK-5SP
LPS-RK-20SP
LPS-RK-1flꭧSP
LPS-RK-5flꭧSP
LPS-RK-25SP
LPS-RK-‹Ω¡ºSP
LPS-RK-1°Ω¡ºSP
LPS-RK-6SP
LPS-RK-30SP
LPS-RK-›Ω¡ºSP
LPS-RK-2⁄Ω¢SP
LPS-RK-6⁄Ω¢SP
LPS-RK-35SP
LPS-RK-⁄Ω™SP
LPS-RK-2⁄Ω™SP
LPS-RK-7SP
LPS-RK-40SP
LPS-RK-flꭧSP
LPS-RK-2°Ω¡ºSP
LPS-RK-8SP
LPS-RK-45SP
LPS-RK-°Ω¡ºSP
LPS-RK-3SP
LPS-RK-9SP
LPS-RK-50SP
LPS-RK-1SP
LPS-RK-3¤Ω¡ºSP
LPS-RK-10SP
LPS-RK-60SP
LPS-RK-1⁄Ω•SP
LPS-RK-3⁄Ω™SP
LPS-RK-12SP
—
LPS-RK-1⁄Ω¢SP
LPS-RK-1›Ω¡ºSP
LPS-RK-4SP
LPS-RK-4⁄Ω™SP
LPS-RK-15SP
LPS-RK-17⁄Ω™SP
—
—
Carton Quantity and Weight
Ampere
Ratings
Weight*
Carton
Qty.
Lbs.
Kg.
0–30
10
1.6
0.725
35–60
10
2.6
1.178
*Weight per carton.
AMPERE
RATING
60
10,000
30
A
1,000
200,000
LPS-RK-1⁄Ω™SP
LPS-RK-¤Ω¡ºSP
100,000
100,000
LPS-RK-⁄Ω¡ºSP
B
400,000
10,000
Catalog Symbol and Amperes
Current-Limitation Curve
1,000
**Meets all performance requirements of UL Standard 248-12 for Class RK1 fuses.
General Information:
• Current limitation for maximum short-circuit protection.
• High speed-of-response is highly sensitive to fault currents,
but insensitive to starting current and transient surges.
• Provides long time-delay for temporary motor start-up.
• Time-delay permits 125% FLA sizing for back-up, motor
running protection.
• Help protect motors from burn-out due to single-phasing.
• Design of heat absorber reduces watts loss.
• PTP fuse tube provides resistance to arcing, moisture and
flame.
• When properly sized, provides Type 2 protection for IEC
starters.
• 2:1 coordination ratio with other LOW-PEAK or Bussmann
Class L fuses.
INSTANTANEOUS PEAK LET-THROUGH CURRENT IN AMPS
Catalog Symbol: LPS-RK_SP
Dual-Element, Time-Delay – 10 seconds (minimum) at 500%
rated current
Current-Limiting
Ampere Rating: ⁄Ω¡º to 60 Amperes
Voltage Rating: 600 Volts AC (or less)
Interrupting Rating: 300,000A RMS Sym. (UL)
300 Volts DC 20,000AIR (UL)
Agency Approvals:
UL Listed, Special Purpose**, Guide JFHR, File E56412
CSA Certified, (200,000AIR), Class RK1 per CSA C22.2,
No. 248.12, Class 1422-02, File 53787
35A to 60A
RMS SYMMETRICAL CURRENTS IN AMPERES
A–B=ASYMMETRICAL AVAILABLE PEAK
(2.3 x SYMM RMS AMPS)
CE logo denotes compliance with European Union Low Voltage Directive
(50-1000 VAC, 75-1500 VDC). Refer to BIF document #8002 or contact
Bussmann Application Engineering at 314-527-1270 for more information.
rev. 9/10/97
Form No. LPS-RK 0-60
Page 1 of 2
BIF Doc #1001
Bussmann®
LOW-PEAK®
LPS-RK
Dual-Element, Time-Delay Fuses
Class RK1 – 600 Volt
0-60 Amps
AMPERE
RATING
60A
30A
20A
6.25
2.5
1.25
.5
300
.2
.3
.4
.6
.8
1
1.6
2
3.2
4
5
8
10
12
300
.1
.15
Time-Current Characteristic Curves–Average Melt
AMPERE RATING
100
100
10
1
TIME IN SECONDS
TIME IN SECONDS
10
RMS SYMMETRICAL CURRENT IN AMPERES
1
1,000
10
1
.1
.01
100
.1
.1
Fuseblocks:
30 Amp Case
1 Pole
2 Pole
3 Pole
R60030-1CR
R60030-2CR
R60030-3CR
Screw
R60030-1SR
R60030-2SR
R60030-3SR
Pressure Plate
R60030-1PR
R60030-2PR
R60030-3PR
1 Pole
2 Pole
3 Pole
Box Lug
R60060-1CR
R60060-2CR
R60060-3CR
Screw
R60060-1SR
R60060-2SR
R60060-3SR
Pressure Plate
R60060-1PR
R60060-2PR
R60060-3PR
20,000
10,000
1,000
100
.01
60 Amp Case
30
Box Lug
RMS SYMMETRICAL CURRENT IN AMPERES
This bulletin is intended to clearly present comprehensive product data and provide technical information that will help the end user with design applications. Bussmann reserves the right, without notice,
to change design or construction of any products and to discontinue or limit distribution of any products. Bussmann also reserves the right to change or update, without notice, any technical information
contained in this bulletin. Once a product has been selected, it should be tested by the user in all possible applications.
Form No.LPS-RK 0-60
Page 2 of 2
BIF Doc #1001
rev. 9/10/97