Insulator swing

Line and span inputs match the Calculator. Insulator chain blow-out uses a 2D utslag (swing) balance: tower deviation in gon (400 gon = full circle); chain masses KV, TV in kg. Weight span uses case 15 (max temp, still air, after creep) sag as bMax. Results use the same 18 load cases as the Calculator (fixed matrix; adjust temperatures via min/max/short-circuit inputs above).

Line & span

LineRuling span an [m]Initial tension sigma0 [MPa]

Height over ground h [m]Min temperature [°C]

Max temperature [°C]

Short-circuit temp [°C]

Ice thickness modeIce thickness [mm]

Selected line

Name: 910 mm² Al59

Area: 910 mm²

Insulator & spans

Conductors per phaseTower deviation angle [gon]Wind span ah [m]Weight span at max line temperature [m]Insulator chain length KL [m]Insulator chain mass KV [kg] (−1 = no swing, vertical chain only)Additional insulator mass TV [kg]Number of insulator strings

Insulator ultimate strength check (SS-EN 50341-2-18)

Per §10.7/SE.1 the design action Ed at load combination 2 (Table 4.7/SE.1, partial factors 1,0) shall not exceed the design resistance Rd = Fuk / γM, with Fuk the specified mechanical failing load (MFL) or specified mechanical load (SML) from the product standard. Below, Ed is the maximum resultant of those horizontal/vertical force components over all cases (±wind where applicable), for the complete suspension.

Governing load case / vindRikt

Load case 2a

	[kN]
`Ed`	57.58
Min. `Fuk` cap-and-pin / composite (γM = 2.5)	143.94
Min. `Fuk` pin / line-post (γM = 2)	115.16

Results

Rows with the highest tension are tinted amber. 0°C still air (a-distance) (0°C — Still air, after creep) uses a blue cell tint. Export CSV or PDF to share.

Case	Temp [°C]	σ [MPa]	Tension [kN]	Sag [m]	Wind [N/m]	Ice [N/m]	Weight span `av` [m]	`qh` [Pa]	Transverse +				Transverse −
Case	Temp [°C]	σ [MPa]	Tension [kN]	Sag [m]	Wind [N/m]	Ice [N/m]	Weight span `av` [m]	`qh` [Pa]	Blow-out [°]	Chain Δv [m]	Chain Δh [m]	Cond. horiz. [m]	Blow-out [°]	Chain Δv [m]	Chain Δh [m]	Cond. horiz. [m]
Load case H Min temp, no wind, before creep	-40.0	58.314	53.07	6.3447	0.00	0.00	330.000	—	0.000	4.3000	0.0000	0.0000	—	—	—	—
Load case D Min temp at wind, before creep	-20.0	53.494	48.68	6.9176	9.80	0.00	330.000	500.00	21.090	4.0120	1.5473	2.7423	-21.090	4.0120	-1.5473	-2.7423
Load case E +15°C, 30% wind, before creep	15.0	41.849	38.08	8.8452	2.94	0.00	330.000	150.00	6.600	4.2715	0.4942	1.0519	-6.600	4.2715	-0.4942	-1.0519
Load case 1a 0°C, bare, before creep	0.0	52.775	48.02	7.0135	17.44	0.00	330.000	890.00	34.469	3.5450	2.4337	4.9489	-34.469	3.5450	-2.4337	-4.9489
Load case 3, A 0°C, ice+normal wind, before creep	0.0	85.699	77.99	9.4077	18.80	29.11	330.000	500.00	19.043	4.0647	1.4030	3.2855	-19.043	4.0647	-1.4030	-3.2855
Load case 2a Ice, no wind, before creep	0.0	85.699	77.99	9.9649	0.00	32.30	330.000	—	0.000	4.3000	0.0000	0.0000	—	—	—	—
0°C still air (initial LC) 0°C — Still air, before creep	0.0	45.000	40.95	8.2246	0.00	0.00	330.000	—	0.000	4.3000	0.0000	0.0000	—	—	—	—
0°C still air (a-distance) 0°C — Still air, after creep	0.0	40.279	36.65	9.1905	0.00	0.00	330.000	—	0.000	4.3000	0.0000	0.0000	—	—	—	—
Load case 2a Ice, no wind, after creep	0.0	80.631	73.37	10.5930	0.00	32.30	330.000	—	0.000	4.3000	0.0000	0.0000	—	—	—	—
Load case 3, B 0°C, ice+normal wind, after creep	0.0	80.631	73.37	10.0007	18.80	29.11	330.000	500.00	19.043	4.0647	1.4030	3.4926	-19.043	4.0647	-1.4030	-3.4926
Load case 1a High wind — 0°C, bare, after creep	0.0	47.849	43.54	7.7369	17.44	0.00	330.000	890.00	34.469	3.5450	2.4337	5.4594	-34.469	3.5450	-2.4337	-5.4594
Load case G +15°C, no wind, after creep	15.0	37.631	34.24	9.8386	0.00	0.00	330.000	—	0.000	4.3000	0.0000	0.0000	—	—	—	—
Load case F +15°C, 30% wind, after creep	15.0	37.865	34.46	9.7779	2.94	0.00	330.000	150.00	6.600	4.2715	0.4942	1.1628	-6.600	4.2715	-0.4942	-1.1628
Load case C +15°C, normal wind, after creep	15.0	40.127	36.52	9.2268	9.80	0.00	330.000	500.00	21.090	4.0120	1.5473	3.6577	-21.090	4.0120	-1.5473	-3.6577
Maximum temperature Maximum temperature	50.0	32.918	29.95	11.2515	0.00	0.00	330.000	—	0.000	4.3000	0.0000	0.0000	—	—	—	—
Short-circuit temperature margin Short-circuit margin	150.0	25.236	22.97	14.6920	0.00	0.00	330.000	—	0.000	4.3000	0.0000	0.0000	—	—	—	—
Temperature at short-circuit conditions Short-circuit temperature (SE.2.5)	200.0	22.935	20.87	16.1753	0.00	0.00	330.000	—	0.000	4.3000	0.0000	0.0000	—	—	—	—
User-defined load case User-defined	0.0	45.000	40.95	8.2246	0.00	0.00	330.000	—	0.000	4.3000	0.0000	0.0000	—	—	—	—